Ion nitriding of equiatomic TiNi shape memory alloys .2. Corrosion properties and wear characteristics

[摘要] The corrosion properties and wear characteristics of Ti50Ni50 and Ti50Ni40Cu10 shape memory alloys with and without ion nitriding were investigated by acid immersion test, electrochemical potentiodynamic measurement and sliding wear test. Experimental results indicate that the non-ion-nitrided TiNi specimens are easily attacked by the HCl and H2SO4 solutions. However, their corrosion properties in these solutions can be markedly improved by ion nitriding. The improved corrosion resistance is attributed to the TIN compound formed in the outermost part of ion-nitrided layers. In addition, the ion-nitrided TiNi specimens, being hardened by the TiN/Ti2Ni compound layers, can exhibit excellent wear resistance and a low friction coefficient. (C) 1997 Published by Elsevier Science S.A.

[发布日期] 1997-07-01

[关键词] ion nitriding;shape memory alloys;TiNi alloys