关键词：Ti-Cu合金；组织；生物材料；生物医学
摘 要：Ti-Co alloys are important biomedical materials for both scientific and technological interests due to their potential applications as hard tissue replacement (HTR).The microstructural characteristics of the alloys in this system are of both scientific and technological interests.This work presents the results of microstructural characterization of as-cast Ti-Co alloys using a combination of various experimental methods.The results confirm that there are two variants of the Laves phase TiCo2,i.e.h-TiCo2 and c-TiCo2 exist in this system of as cast state.The eutectic reaction L←→(β-Ti)+ Ti2Co is determined to be occur at at 23 at.％ Co,1020 ℃.Four peritectic reactions,i.e.L+ TiCo←→ Ti2Co,L+ TiCo←→ (c-TiCo2),L+(c-TiCo2)←→(h-TiCo2) and L+Co←→ TiCo3 occur at 1058 ℃,1235 ℃,1210 ℃,and 1190 ℃,respectively.Eutectoid reaction (βTi) ←→(αtTi)+ Ti2Co occurs at 9 at.％ Co,685 ℃.