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1.
Growth Kinetics of β´Precipitation in a Ferritic Matrix During Isothermal Aging of Cu-containing Fe-10at.%Ni-15at.%Al alloys
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Dorantes-Rosales, Hector J.
; Ferreira-Palma, Carlos
; Lopez-Hirata, Victor M.
; Saucedo-Muñoz, Maribel L.
; Avila-Davila, Erika O.
; Hernandez-Santiago, Felipe
; Villegas-Cárdenas, José D.
; Rivas-Lopez, Diego
.
Abstract A precipitation study was carried out during the isothermal aging at 850 °C for Fe-10at.%Ni-15at.%Al, Fe-10at.%Ni-15at.%Al-2.5at.%Cu and Fe-10at.%Ni-15at.%Al-5at.%Cu alloys. The experimental, Calphad, and Kinetic/Precipitation calculated results indicated that the Cu-addition to the ternary alloy promoted a higher volume fraction of β´precipitates, which caused a better aging response for the Cu-containing alloys. The coarsening resistance was the highest for the 2.5 at. % Cu-containing alloy, compared to the ternary alloy because of its lower interfacial free energy, 0.009 Jm-2, between the precipitate and the matrix. The Cu alloying element was located mainly in the β´ precipitate according to its expected thermodynamic behavior, and it caused an atomic relation of Ni to Al close to that of NiAl intermetallic compound for the β´phase. A content of 5 at. % Cu in the ternary alloy promoted higher interfacial energy, 0.04 Jm-2, and thus the fastest coarsening process.
https://doi.org/10.1590/1980-5373-mr-2021-0232
54 downloads
2.
Soil macrofauna under different land uses in the Colombian Amazon
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Suárez, Leonardo Rodríguez
; Josa, Yuli Tatiana Paladines
; Samboni, Erika Judith Astudillo
; Cifuentes, Karla Dayana Lopez
; Bautista, Ervin Humprey Durán
; Salazar, Juan Carlos Suárez
.
Pesquisa Agropecuária Brasileira
- Métricas do periódico
Resumo: O objetivo deste trabalho foi avaliar a macrofauna edáfica e os grupos taxonômicos bioindicadores associados a diferentes usos da terra na Amazônia colombiana. Doze arranjos agroflorestais foram estudados e comparados com a mata nativa e a pastagem. Para cada uso da terra, seis monólitos, divididos em quatro camadas (serrapilheira, e 0-10, 10-20 e 20-30 cm de profundidade) foram coletados aleatoriamente. As variáveis consideradas na análise do efeito dos usos da terra foram: indivíduos por metro quadrado, riqueza de ordens, índice de diversidade de Shannon e índice de equidade de Pielou. Os maiores valores de densidade e diversidade de macrofauna do solo ocorreram na floresta, em contraste com a pastagem. A análise dos componentes principais distinguiu os usos do solo de acordo com a diversidade da macrofauna, tendo separado a floresta nativa dos outros usos da terra. A análise de agrupamento indicou o potencial de alguns sistemas agroflorestais para conservar os valores de densidade e diversidade da macrofauna edáfica semelhantes aos da floresta. De acordo com a análise do valor do indicador, cinco grupos taxonômicos (Diplura, Pseudoscorpionida, Araneae, Chilopoda e Gastropoda), identificados como bioindicadores, estão associados a locais conservados, em razão da sensibilidade de suas populações.
Abstract: The objective of this work was to evaluate the soil macrofauna and the bioindicator taxonomic groups associated with different land uses in the Colombian Amazon. Twelve agroforestry arrangements were studied and compared with to the native forest and pasture. For each land use, six monoliths were randomly selected and divided into four layers (litter, and 0-10, 10-20, and 20-30 cm soil depths). The variables considered in the analysis of land use effects were: individuals per square meter, order richness, Shannon’s diversity index, and Pielou’s evenness index. The greatest values for soil macrofauna density and diversity occurred in the forest, in contrast with the pasture. The principal component analysis distinguished land use according to macrofauna diversity, separating the native forest from the other land uses. The cluster analysis indicated the potential of some agroforestry systems to conserve the values of soil macrofauna density and diversity similar to those of the forest. According to the analysis of indicator value, five taxonomic groups (Diplura, Pseudoscorpionida, Araneae, Chilopoda, and Gastropoda), identified as bioindicators, are associated with preserved sites because of the sensitivity of their populations.
https://doi.org/10.1590/s0100-204x2018001200011
1431 downloads
3.
Analysis of Spinodal Decomposition in Al-Zn and Al-Zn-Cu Alloys Using the Nonlinear Cahn-Hilliard Equation
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Lopez-Hirata, Victor Manuel
; Avila-Davila, Erika Osiris
; Saucedo-Muñoz, Maribel-Leticia
; Villegas-Cardenas, Jose David
; Soriano-Vargas, Orlando
.
The phase field model based on the nonlinear Cahn-Hilliard equation was applied to analyze the spinodal decomposition process in Al-Zn and Al-Zn-Cu alloys. Partial differential equations were solved using the explicit finite difference method for the Al- 20, and 35 at. % Zn alloys aged at temperatures between 25 and 100 °C for times from 10 s to 2000 s and Al-20at.%Zn-10at.%Cu and Al-20at.%Zn-5at.%Cu alloys at temperatures between 400 and 500 °C for times from 3600 to 360000 s. Thermo-Calc indicated that the copper addition extends the presence of the metastable miscibility gap up to a temperature of about 597 °C in comparison to the temperature of 350 °C for the binary case. This miscibility gap was calculated assuming that the equilibrium phases were not present and thus it is only existing at the early stages of aging. Simulation results pointed out that the phase decomposition process is much faster in the binary alloys than that in the ternary alloys in spite of the higher aging temperature for the latter case.
https://doi.org/10.1590/1980-5373-mr-2015-0373
2573 downloads
4.
Antifungal activity of caspofungin in experimental infective endocarditis caused by Candida albicans
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Victorio, Gerardo Becerra
; Bourdon, Lorena Michele Brennan
; Benavides, Leonel García
; Huerta-Olvera, Selene G
; Plascencia, Arturo
; Villanueva, José
; Martinez-Lopez, Erika
; Hernández-Cañaveral, Iván Isidro
.
Memórias do Instituto Oswaldo Cruz
- Métricas do periódico
BACKGROUND Infective endocarditis is a disease characterised by heart valve lesions, which exhibit extracellular matrix proteins that act as a physical barrier to prevent the passage of antimicrobial agents. The genus Candida has acquired clinical importance given that it is increasingly being isolated from cases of nosocomial infections. OBJECTIVE To evaluate the activity of caspofungin compared to that of liposomal amphotericin B against Candida albicans in experimental infective endocarditis. METHODS Wistar rats underwent surgical intervention and infection with strains of C. albicans to develop infective endocarditis. Three groups were formed: the first group was treated with caspofungin, the second with liposomal amphotericin B, and the third received a placebo. In vitro sensitivity was first determined to further evaluate the effect of these treatments on a rat experimental model of endocarditis by semiquantitative culture of fibrinous vegetations and histological analysis. FINDINGS Our semiquantitative culture of growing vegetation showed massive C. albicans colonisation in rats without treatment, whereas rats treated with caspofungin showed significantly reduced colonisation, which was similar to the results obtained with liposomal amphotericin B. CONCLUSIONS The antifungal activity of caspofungin is similar to that of liposomal amphotericin B in an experimental model of infective endocarditis caused by C. albicans.
https://doi.org/10.1590/0074-02760160494
1158 downloads
5.
High Prevalence of ITPA Alleles Associated with Ribavirin-Induced Hemolytic Anemia Among Mexican Population
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Gonzalez-Aldaco, Karina
; Panduro, Arturo
; Pinho, João R. Rebello
; Martinez-Lopez, Erika
; Gleyzer, Ketti
; Fierro, Nora A.
; Roman, Sonia
.
ABSTRACT Background. The prevalence of two functional polymorphisms (rs1127354 and rs7270101) of the inosine triphosphatase (ITPA) gene associated with ribavirin-induced hemolytic anemia (RIHA) during antiviral therapy for hepatitis C virus (HCV) infection varies by ethnicity. In Mexico, the distribution of these polymorphisms among Native Amerindians (NA) and admixed population (Mestizos) is unknown. This study aimed to determine the prevalence of the ITPA polymorphisms among healthy NA and Mestizos, as well as in HCV patients from West Mexico. Material and methods. In a cross-sectional study, 600 unrelated subjects (322 Mestizos, 100 NA, and 178 treatment-naïve, HCV-infected Mestizos patients) were enrolled. A medical history was registered. ITPA genotype was determined by Real-Time PCR. Fst-values and genetic relatedness between study and reference populations were assessed. Results. The frequency of the risk genotypes rs1127354CC and rs7270101AA was higher among NA (98-100%) than in Mestizos (87-92.9%), (p < 0.05). The NA presented the highest prevalence of the rs1127354CC genotype reported worldwide. The Fst-values revealed a genetic relatedness among Mexican NA, South Americans and African populations (p > 0.05). The frequency of the predicted risk for RIHA was higher among NA (98%) than in Mestizos (80.5%) and HCV-infected patients (81.5%) (p < 0 .01). The CC/AA alleles were associated with lower values of total bilirubin, aspartate/alanine aminotransferases, and aspartate-to-platelet-ratio-index score among HCV-patients. Conclusion. A high prevalence of the ITPA polymorphisms associated with RIHA was found in Mexican NA. These polymorphisms could be a useful tool for evaluating potential adverse effects and the risk or benefit of antiviral therapy in Mexicans and other admixed populations.
https://doi.org/10.5604/16652681.1231580
504 downloads
6.
Trabajos de investigación presentados en el L Congreso Mexicano de Anestesiología: Chihuahua 2017. México
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Ríos Medrano, Alea Fernanda
; Herrero Trujillano, Manuel
; Robles López, Maria Decire
; Rodríguez Barajas, Ruben
; Gutiérrez-Martínez, Paola Virginia
; Ramírez-Gómez, Melba
; Olvera-Hernández, Jesus Arnoldo
; Márquez Noyola, Elizabeth Alicia
; Almonte de León, Héctor
; Hernández Mancilla, Arturo
; Castro Salinas, José Ernesto
; Medrano-Duarte, Olga Abigahil
; Ramírez-Mendoza, Karla
; Rodriguez-Nieves, Georgina Monserrat
; Pareces Ríos, Adriana
; Ruiz-Rubio, Yolanda
; Hernández-Santiago, María Guadalupe
; Ramírez Mendoza, Karla
; Medrano Duarte, Olga Abigahil
; Martínez-Alpuche, Rocío Adriana
; Valenzuela-Priego, Francisco
; Álvarez-Santiago, José Heriberto
; Lugo-Rodríguez, Julian
; Betancourt-Sandoval, Alonso
; Prince-Angulo, Silvia Annel
; Martínez-Felix, Israel
; Salazar-Castro, Laura
; Espinazo-Quintero, Erendira
; Otañez, Monica Thalia
; Priego, Gloria
; Alzate, Ana Lizette
; Salazar, Laura Elena
; Nieblas, Mariela
; Martinez, Israel
; Alvarez-Betancourt, Ana Elsa
; Sánchez-Hernández, Eloy
; Romo-Serrano, Erika
; Rodríguez-Jauregui, Adriana
; Díaz-Aceves, Erica Raquel
; Arteaga-Trejo, Jaime
; Rodríguez-Jáuregui, Adriana
; Robles-Lopéz, María Decire
; Ibarra-González, María Livier
; Alvarez-Betancourt, Ana Elsa
; Díaz-Aceves, Erica Raquel
; Arteaga-Trejo, Jaime
; Santana-Sonora, Beatriz Alejandra
; Prince-Angulo, Silvia Annel
; Sandoval-Rivera, Arturo Guadalupe
; Camacho-López, Jesús Erick
; Alzate-Moctezuma, Ana Lizette
; Valencia-Echávarri, Andrea
; Canales-Bonilla, Carlos Patricio
; Ramos-Hernández, Julia Demetria
; Flores-Posada, Jesus Jonathan
; Muñoz Garcia, Aleyda
; Osorio Santiago, Maria Areli
; Lopez Cartita, Victor
; Ortega, Julio
; Fuentes García, Víctor E
; Moyao García, Diana
; Villars Zamora, Elvia Gabriela
; Prince Angulo, Silvia Annel
; Gerardo Angulo, Alma Ruth
; Martinez Felix, Israel
; Ayala Camargo, Yuridia
; Esquer de la Rosa, Jaquelyn Roxana
; Trapaga Millares, Yazmin
; Sánchez León, Claudia Elena
; Vásquez Puente, Felipe
; Rojo Medina, Victor Javier
; Urias Romo de vivar, Emma Gabriela
; Prince Angulo, Silvia Annel
; Ojeda Ramos, Joel
; Caceres Figueroa, Leonardo Andres
; Martinez Reyes, Maria Fernanda
; Contreras Ramírez, Nathalie
; Martínez Barreto, Nelly
; Ruelas León, Berenice
; Reyes Salgado, Karla
; Ruvalcaba Sánchez, Rafael
; Núñez Valencia, Carolina
; Escamilla Asiain, Gabriela
; Carranza-Cortés, José Luis
; Puga-Flores, Eva del Carmen
; Jiménez-Cardona, María Beatriz
; Puga-García, Diana Marisol
; Alcaraz-Ramos, Rosina
; Martinez-Delgado, Olinda
; Zamudio-Gracia, Carlos Amador
; Mireles Vega, Elizabeth
; Hernández López, Clara
; Ceballos Niño, Jose Luis
; Carreño Caballero, Jessica
; Montiel Jarquín, Álvaro José
; López García, Ingrid
; Serrano Cuevas, Beatriz
; Martinez Marin, Dolores Guillermina
; Díaz-Aceves, Erica Raquel
; Romo-Serrano, Erika
; Campechanos-Asencio, María de los Ángeles
; Rodríguez-Jáuregui, Adriana
; Betancourt-Álvarez, Ana Elsa
; Arteaga-Trejo, Jaime
; Arteaga-Trejo, Jaime
; Romo-Serrano, Erika
; Rios-Navarro, Ramón Alejandro
; Rodriguez-Jauregui, Adriana
; Alvarez-Betancourt, Ana Elsa
; Diaz Aceves, Érica Raquel
; Calleja-Zenteno, Liliana
; Fernández-Vázquez, María Urbelina
; Carreño-Caballero, Jessica
; Serrano Cuevas, Beatriz
; Montiel Jarquín, Álvaro José
; Carreño- Caballero, Jessica
; Cortes- Pineda, Claudia
; Fernández-Vázquez, María Urbelina
; Hernández-Domínguez, Juan
; Serrano-Cuevas, Beatriz
; Ruiz- Luna, Mayra
; Gómez-Moreno, Julieta Berenice
; Hernández-Santiago, Maria Guadalupe
; Ruiz-Rubio, Yolanda
; Ruiz-Serrano, Ana Cristina
; Medina-Flores, Aleida
; Sánchez Torres, Claudia
; Osorio Santiago, María Areli
; Lee, Angel
; Correa-Ovis, Jose Francisco
; Priego-Martínez, Luis Alberto
; Valencia-Carrillo, Miguel
; Sánchez-Arteaga, Sofia
; Cruz-Márquez, Abraham Josué
; Duran-Zamora, Karina Aurora
; Corral-Guerrero, Sergio Francisco
; Arce Bojorquez, Brisceyda
; Medina, Francisco
; Felix, Pavel
; Estrada, Haydeé Gloria
; González-Herrera, Francisco Javier
; Zepeda Olivera, Silvia
; Pablo-Yañez, Julio Cesar
; Colores Velazquez, Julio Cesar
; Calva Maldonado, Miguel
; Veyna Rocha, Sissy Barubi
; Veyna Rocha, Abraham Irishd
; Rodríguez-Rodríguez, María Guadalupe
; Castillo- Rodriguez, Juan Orlando
; Martínez-Figueroa, Brenda Paola
; Romero Guillén, Lorena Priscila
; Pavía Vega, Susy Sáez
; Jiménez Siles, María Eugenia
; Hurtado Reyes, Ignacio Carlos
; Rojas Zarco, Eder Marcelo
; Sánchez Tapia, Mario Alberto
; Villicaña-Ayala, Carolina
; Díaz-Aguilar, Marco Antonio
; Apolinar Jiménez, Evelia
; García-Parra Pérez, Paola Carolina
; García-Parra Pérez, Natalia Cristina
; Yee-Rendón, Zumey
; Valle-Leal, Jaime Guadalupe
; Reyes-Jiménez, Gerardo Antonio
; Ortiz-Magallanes, Elías
; Sanchez-Aguilar, Maricela
; Mota-Figueroa, Roanne Patrician
; Espinosa-Tadeo, Aldo Ernesto
; Díaz-Hernández, Alejandro Eduardo
; Cendón-Ortega, María Mercedes
; Ortega-Ponce, Fabiola Estela Elizabeth
; Romero-Guillen, Lorena Priscila
; Cruz Castañedo, Greta
; Constantino-Rivera, Luis Armando
; Gordillo-Paniagua, Jorge Alberto
; Contreras-Ramírez, Nathalie
; Bernal-Zambrano, Luis Omar
; Flores-Alvarado, Rosa María
; Ferrera-Sarquís, María Aurora
; Espino Vega, Ana Frain
; Guillen-Narváez, María del Rocio
; López-García, Rocío Angélica
; Martínez-Sánchez, Angélica
; Huerta-Beltrán, Juana Geraldine
; Gómez-Rojas, Juan Pablo
; Rivera-Ruiz, Rodolfo Eduardo
; Ramírez Reyes, Liliana Georgina
; Muñoz Martínez, Raúl
; Martínez-Morales, Nayeli Noemi
; Mariscal-Cervantes, Beatriz
; Chávez-Barragán, Oscar Fernando
; Barrera-de León, Juan Carlos
; Carrillo-Guerra, Valentin
; Huitrón-Hernández, José Alonso
; De la Rosa-Fabián, Viviana Marysela
; Zertuche-Méndez, David Ricardo
; Riquelme Holguin, Karla Talia
; Gutierrez Beltran, Maria del Refugio
; Martinez-Tapia, Maria Elena
; Amezquita Esparza, Monica
; Portillo Villalobos, Samantha
; Díaz Solís, Erick Iván
; Estrada Utrera, Maria Sandra
; Islas Ruz, Félix Gilberto
; Pérez Díaz, Roberto
; Chávez-Contreras, Sara Idali
; Zepeda Olivera, Silvia
; Calva-Maldonado, Miguel
; Fragoso-Avilés, Fabían
; Rosa-Moya, Griselda de la
; Ávila-López, Armando
; López Castruita, Victor Manuel
; Manrique Carmona, Luisa Piedad
; Ramírez- Martínez, Elizabeth
; Rojas-Peñaloza, Janeth
; López-Gómez, Antonio
; Veyna Rocha, Abraham Irishd
; Veyna Rocha, Sissy Barubi
; Torres Hernández, Rosa
; Aleman-Ortega, Cristina
; Guevara-Pérez, Alejandra
; Castillo Gamez, Tobias Francisco
; Gutierrez Beltran, María del Refugio
; Martínez Tapia, María Elena
; Alanis Uribe, Karla
; Guerrero Morales, Fernando
; Molina Rodríguez, Gloria
; Gómez Cruz, José Roberto
; Tapia Castro, Gabriela
; Ley, Marcial Luis
; Castro Ortega, Julio
; Martínez, Leo Bruno
; Portugal Moreno, Víctor Hugo
; García Cabello, Luis Manuel
.
15352 downloads
7.
The Development of the Study of Hereditary Cancer in South America
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Rossi, Benedito Mauro
; Sarroca, Carlos
; Vaccaro, Carlos
; Lopez, Francisco
; Ashton-Prolla, Patricia
; Ferreira, Fabio de Oliveira
; Santos, Erika Maria Monteiro
.
https://doi.org/10.1590/1678-4685-gmb-2014-0366
1398 downloads
8.
Trabajos de investigación presentados en el XLIX Congreso Mexicano de Anestesiología: Zacatecas 2015. México
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Sánchez, Claudia
; Osorio-Santiago, María Arelí
; Medina-Tarango, Marco Antonio
; Fernandez De Lara, Alfredo
; Castro-Salinas, Jose Ernesto
; Salazar-Luna, Miguel Angel
; Sanchez, Placido
; Castro-Cayetano, José Esteban
; Millán Hernández, Manuel
; Almonte, Hector Asencion
; Zamora-Aguirre, Salvador A.
; Gudiño, Yocelin Montserrat
; Reyes-Valle, Roberto
; Zepeda-Olivera, Silvia
; Ferretiz-López, Giancarlo
; Salgado, Mónica
; Moctezuma-Ramírez, Luis
; Hernández-Ortiz, Israel Ivan
; Hernández-Zenteno, Norma Angelica
; Martinez, Raquel
; Sánchez-Hernández, Eloy
; Camacho-Gómez, Aldo Constantino
; Martinez, Raquel
; Chenge-Said, Jarumi
; Flores Fonseca, Elvia
; López-Centeno, Martha Alicia
; López, Angélica Yanine
; Jiménez-Ramos, Adriana
; Velasco-Sordo, Luis Ramón
; Hurtado-Reyes, Ignacio Carlos
; Castellanos, Antonio
; Rojas-Peñaloza, Janeth
; Zapién-Madrigal, Jesús Miguel
; Sánchez, Placido
; Sánchez-López, Eric Mauricio
; Mendoza- García, María Isabel
; Calzada-Grijalba, José Francisco
; Hernandez, Israel Ivan
; Castellanos De León, Edgar
; Luna Medina, Cinthya Isabel
; Alvarez-Mora, Lucy Andrea
; López, Angélica Yanine
; Jiménez-Ramos, Adriana
; Velasco-Sordo, Luis Ramón
; Hurtado-Reyes, Ignacio Carlos
; Diaz, Erica Raquel
; Hernandez-Gutierrez, Deoselina
; Gargiulo, Paul Raphael
; Barragán, Maria Jimena
; Ham Mancilla, Ofelia
; Zamora- Gutiérrez, Ana Lilia
; Arteaga, Jaime
; Hernández-Gutierrez, Deoselina
; Ríos-Navarro, Ramón Alejandro
; Romo-Serrano, Erika
; Castellanos, Antonio
; Zapién-Madrigal, Jesús Miguel
; Rojas- Peñaloza, Janeth
; Garduño, Araceli Marselle
; Flores-Rodriguez, Alfonso de Jesus
; Cuervo-Ggonzalez, Alma Kenia
; Puente-Solorio, Armando
; Benitez-Rebollar, Joel Enrique
; Gaona-Valle, Laura Soraya
; Jaime, Mayra Alicia
; Ortega-Suarez, Lizbeth
; Barrientos-Quintanilla, Luis Alberto
; Alvarado-Ramos, Salomon
; Moya-Morales, Yuliana
; Ferretiz, Giancarlo
; César, Julio
; Yañez, Pablo
; Reyes-Valle, Roberto
; Colores-Velazquez, Julio César
; Luna, Arístides De Jesús
; Almonte, Hector Asencion
; Márquez-Noyola, Elizabeth Alicia
; Castellanos, Antonio
; Barrera, Lorena
; Cabrera-Sánchez, Miroslava
; Fernanández-Muñoz, Angel Fernando
; Rolón-Sánchez, Yumara Georgina
; Barragán-Hernández, Adriana Guadalupe
; Lòpez, Estefania
; Osorio-Santiago, Maria Areli
; Muñoz, Beatriz Adelaida
; Cruz-Bautista, Mayra Ivette De La
; Ripoll-Aburto, Carlos Andres
; Ortiz-Maldonado, Jessie Karolina
; Hernández-Rasgado, Javier
; Cuj-Díaz, Alberto
; Sanchez, Placido
; Sarmiento, Lina
; Peña-Olvera, Silvia
; Santiago-Poot, Nohemí
; López, Angélica Yanine
; Jiménez-Ramos, Adriana
; Hurtado-Reyes, Ignacio Carlos
; Ferretiz, Giancarlo
; Pablo-Yañez, Julio César
; Flores-Martinez, Juan Ramón
; Chavez-Contreras, Sara Idali
; Gudiño-Larios, Yocelin Montserrat
; Velazquez, Sara
; Vences-Perez, Noemi Dolores
; Ayala-Bermudez, Celina Alejandra
; Garcia-Castro, Marco Tulio
; Gordillo-Parra, Alejandra
; Barrera, Lorena
; Cabrera-Sánchez, Miroslava
; Martínez-García, Claudia Lizeth
; Zuñiga-Iñiguez, Paloma
; Anaya-Romo, Eduardo
; Antelo-Corral, Jaqueline
; Ramos, Perla Del Carmen
; Hernández-Rasgado, Javier
; Cuj-Díaz, Alberto
; Fonz-Murillo, Elma Patricia
; Cruz-Bautista, Mayra Ivette De la
; Ripoll-Aburto, Carlos Andres
; Cruz, Mayra Ivette De La
; Cuj-Díaz, Alberto
; Hernández-Rasgado, Javier
; Vega-Cano, Miguel
; Ramos-Rodríguez, Perla del Carmen
; Muñoz-Hernández, Beatriz Adelaida
; Caceres, Leonardo Andres
; Arteaga-Favela, Claudia Berenice
; Nava-Osorio, Alejandro
; Arce-Bojorquez, Brisceyda
; Urias, Emma
; Rosario-Ayala, Yuridia Del
; Salazar-Castro, Laura Elena
; Nieblas-Torres, Mariela Lizet
; Arce-Bojorquez, Brisceyda
; Prince-Angulo, Silvia Annel
; Espinoza-Quintero, Erendira
; Alzate, Ana Lizette
; Camacho, Jesus Erick
; Aviles-Lozoya, Jose Trinidad
; Urias, Emma
; Espinoza-Quintero, Erendira
; Castellanos, Antonio
; Cruz, Nora Cecilia
; Rendón-Salazar, Dafne Denisse
; González-Cordero, Gustavo
; Garduño-Chávez, Belia Inés
; Orozco, Arturo Emmanuel
; Guerrero-Morales, Fernando
; Gonzalez-Ortiz, Julio Cesar
; Casillas-Cruz, Angel Alberto
; Aquino-Tamayo, Blanca Olga
; Estrada, Haydeé Lucía
; Soberanes-Alderete, Francisco Javier
; Ojeda-Ramos, Joel
; Martinez-Flores, Carlos
; Sandoval-Rivera, Arturo Guadalupe
; Cáceres-Figeroa, Leonardo Andres
; Ortega, Columba
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Numerical analysis of phase decomposition in A-B binary alloys using Cahn-Hilliard equations
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Lezama-Alvarez, Susana
; Avila-Davila, Erika O.
; Lopez-Hirata, Victor M.
; Gonzalez-Velazquez, Jorge L.
.
The analysis of phase decomposition was carried out using the nonlinear and linear Cahn-Hilliard equations in a hypothetical A-B alloy system with a miscibility gap. These equations were solved by the explicit finite difference method assuming a regular solution model. The supersaturated solid solution and decomposed phases were considered to have an fcc structure. Different aging temperatures and thermodynamic interaction parameters ΩA-B were used to simulate different alloy systems. The numerical simulation results showed that the growth kinetics of phase decomposition in the alloy with 30at.% A was slower than that of 50 at.% A. Additionally, the start time and modulation wavelength of phase decomposition are strongly affected by the thermodynamic interaction parameter ΩA-B value. The numerical simulation results showed that the growth kinetics of phase decomposition with the linear equation is slower than that with the nonlinear one.
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