CAJ | 학술논문

通过真空热压及热轧制制备SiCp/Al-Ti复合箔材.研究在1 200℃反应退火时Ti、Al及SiC颗粒的扩散反应机理与组织演化过程.通过扫描电子显微镜及能谱对多层金属间化合物的微观组织与成分进行观察与分析,通过X射线衍射确定SiC与TiAl化合物之间的反应产物,并采用差热分析法对反应热力学进行分析.结果表明:试样中出现分层现象并且SiC颗粒消失;多层金属间化合物的成分确定为Ti3Al、TiAl和TiAl3;退火过程中SiC 与TiAl化合物发生反应,生成Ti3AlC、TiC、TisSi3及Ti3SiC2.
통과진공열압급열알제제비SiCp/Al-Ti복합박재.연구재1 200℃반응퇴화시Ti、Al급SiC과립적확산반응궤리여조직연화과정.통과소묘전자현미경급능보대다층금속간화합물적미관조직여성분진행관찰여분석,통과X사선연사학정SiC여TiAl화합물지간적반응산물,병채용차열분석법대반응열역학진행분석.결과표명:시양중출현분층현상병차SiC과립소실;다층금속간화합물적성분학정위Ti3Al、TiAl화TiAl3;퇴화과정중SiC 여TiAl화합물발생반응,생성Ti3AlC、TiC、TisSi3급Ti3SiC2.
SiCp/Al-Ti foils were prepared by hot-pressing and hot rolling.The diffusion reaction between Ti and SiCp/Al was investigated and multi-layers of intermetallics formed during reaction annealing at 1 200 ℃.The microstructure and the composition in each intermetallic layer were characterized using scanning electron microscope (SEM) equipped with energy dispersive spectroscope (EDS).The products from the reaction between SiC and titanium aluminides were determined by X-ray diffractometer (XRD) and the thermodynamics of the reaction was investigated using differential thermal analysis (DTA).The results show that different reactive layers form in the sample and SiC particles disappear with the formation of intermetallie layers after annealing.Intermetailic multi-layers are determined to be Ti3Al,TiAl and TiAl3.SiC particles react with titanium aluminide during reaction annealing to form Ti3AlC,TiC,Ti5Si3 and Ti3SiC2.