CAJ | 학술논문

采用压力浸渗法成功制备网状结构的Ti-Al复合体,使用OM、XRD、SEM以及能谱仪对制备的Ti-Al复合体进行组织观察与分析.采用共晶Al-Si合金代替纯Al可有效降低压力浸渗所需温度,降低液态Al与Ti颗粒表面接触而发生的非扩散控制反应的剧烈程度.反应层厚度控制在3μm左右,最先反应产物为TiAl3相.压力浸渗时,Ti原子溶于Al-Si液相及Si原子向Ti颗粒表面富集使得在反应层外侧及Ti-Al复合体Al相中形成TiSi2Al相.挤压变形组织显示制备的Ti-Al复合体具有优异的变形能力.
채용압력침삼법성공제비망상결구적Ti-Al복합체,사용OM、XRD、SEM이급능보의대제비적Ti-Al복합체진행조직관찰여분석.채용공정Al-Si합금대체순Al가유효강저압력침삼소수온도,강저액태Al여Ti과립표면접촉이발생적비확산공제반응적극렬정도.반응층후도공제재3μm좌우,최선반응산물위TiAl3상.압력침삼시,Ti원자용우Al-Si액상급Si원자향Ti과립표면부집사득재반응층외측급Ti-Al복합체Al상중형성TiSi2Al상.제압변형조직현시제비적Ti-Al복합체구유우이적변형능력.
Ti-Al complex with a network microstructure was successfully fabricated by pressure infiltration.The fabricated Ti-Al complex was investigated and analyzed by OM,XRD,SEM and EDS.The temperature of pressure infiltration was reduced by using Al-Si eutectic alloy instead of pure Al,which can effectively decrease non-diffusion reaction between liquid Al and solid Ti particles.The reaction thickness can be controlled at about 3 μm.The primary reaction product is TiAl3 intermetallics.As Ti atoms dissolve into the Al-Si liquid phase and Si atoms enrich on the surface of Ti particles,TiSi2Al is formed in Al phase of Ti-Al complex and outside the surface of Ti-Al reaction layer.The microstructure of the as-extruded Ti-Al complex indicates that the prepared Ti-Al complex possesses a superior deformation capability.