SciELO - Scientific Electronic Library Online

vol.15 issue5Effect of current and atomized grain size distribution on the solidification of Plasma Transferred Arc coatingsRapid solidification of an Al-5Ni alloy processed by spray forming author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Materials Research

Print version ISSN 1516-1439


BENEGRA, Marjorie; PINTAUDE, Giuseppe; D'OLIVEIRA, Ana Sofia Clímaco Monteiro  and  GOLDENSTEIN, Helio. Characterization of NiCrAlC PTA coatings. Mat. Res. [online]. 2012, vol.15, n.5, pp.775-778.  Epub Aug 16, 2012. ISSN 1516-1439.

Surface tailoring with plasma transferred arc (PTA) hardfacing involves the deposition of powder mixtures to produce coatings with an almost unlimited chemical composition. PTA hardfacing is particularly important for processing low weldability alloys, such as those for high-temperature applications, of which NiCrAlC is an example. This study analyzed NiCrAlC coatings processed by PTA using a mixture of elemental powders. Deposition on AISI316L plates was carried out with currents of 100 A and 130 A to induce variations in the chemical composition of the coatings, which were also subjected to isothermal exposure at temperatures of up to 1000 ºC for up to 72 hours in an air furnace. The results show that the aluminide compounds were stable, the coatings that solidified more slowly having the highest hardness after temperature exposure and potentially being suitable for use in high-temperature abrasion environments.

Keywords : nickel aluminides; plasma transferred arc; high-temperature.

        · text in English     · English ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License