SiC_P/Al—Si复合材料中SiC/Al的晶体学位向关系

CRVSTALLOGRAPHIC ORIENTATON RELATIONSHIP BETWEEN SiC AND Al IN SiC_p/Al-Si COMPOSITES

采用ＴＥＭ研究了离心铸造和挤压铸造的ＳＩＣP／ＺＬ１０９复合材料中ＳＩＣ／ＡＩ的晶体学位向关系对１２个ＳｉＣ／ＡＩ位向关系的测量结果表明，虽然ＳｉＣ与ＡＩ之间无固定的晶体学位向关系，但出现了如下优先位向关系：（１１０３）ｓｉｃ／／（１１１）ＡＩ，［１１２０］ｓｉｃ／／［１１０］ＡＩ．

SiC/Al interfaces in the SiCp/ZL109 composites fabri.Cated by centrifugal casting andsqueez casting were characterized by conventional TEM. Measurements of crystallographic orientationrelationship between SiC and Al were made at 12 SiC/AI interfaces, showing that no Ased and uniqueorielltation relationships was determined, though the following preferential one was observed: (1103)sic//(111)Al, [1120]sic // [110]Al. And, the relationship of (0001)sic // {111}Al was found not to be an energetically favoured one. The reasons why the relevant orientation relationship were formed or not formed were discussed.