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采用ＴＥＭ、ＥＥＬＳ测定了Ｔｉ／ＴｉＣｐ复合材料界面相为Ｔｉ２Ｃ。根据电子衍射理论和晶体学理论确定了Ｔｉ２Ｃ晶体的晶胞大小和晶胞中Ｔｉ、Ｃ原子坐标，并讨论了Ｃ空位的有序排列规律。Ｔｉ２Ｃ晶胞中有４８个原子：３２个Ｔｉ原子，１６个Ｃ原子。Ｔｉ原子占据空间群的３２ｅ等效位置（ｘ取３／８或７／８），Ｃ原子占据空间群的１６ｃ或１６ｄ等效位置。Ｆ１１１ＧＣ原子平面上Ｃ空位作有序排列。Ｃ原子占有率为３／４和互／４的Ｆ１１１ＧＣ原子面交替排列。＜１１１＞方向一个周期长度内包含６层Ｔｉ原子面和６层Ｃ原子面，其排列规律为：
The phase interface of Ti / TiCp composite was Ti2C by TEM and EELS. According to the theory of electron diffraction and crystallography, the unit cell size of Ti2C crystal and the coordinate of Ti and C atoms in the unit cell have been determined, and the ordered arrangement of C vacancies has been discussed. Ti2C unit cell has 48 atoms: 32 Ti atoms, 16 C atoms. The Ti atom occupies the 32e equivalent position of the space group (x takes 3/8 or 7/8) and the C atom occupies the 16c or 16d equivalent position of the space group. On the plane of F111GC, C vacancies are arranged in order. C atom occupancy rate of 3/4 and each / 4 F111GC atomic planes alternately arranged. The length of one cycle of <111> direction contains 6 layers of Ti atomic planes and 6 layers of C atomic planes. The arrangement rule is as follows: