Characterization of NiCrAlC PTA coatings

Materials Research

Marjorie Benegra²  Giuseppe Pintaude¹  Ana Sofia Clímaco Monteiro D'oliveira¹  Helio Goldenstein¹ 

[1] ,FAE Centro UniversitárioCuritiba PR ,Brazil

关键词: nickel aluminides;    plasma transferred arc;    high-temperature;   

DOI  :  10.1590/S1516-14392012005000098

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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