Synthesis of Ti2AlN Cermet Strengthened by A12O3
Bulk intermetallic-ceramic composites in Ti-Al-N system were fabricated by reactive hot pressing of TiAl3+TiN+TiO2 powders at 1380℃ under l0MPa pressure. The phase chemistry and microstructure were characterized by X-ray diffraction and scanning electron microscopy. The mixture with mass ratio of Al3Ti : TiN : TiO2 equal to 2. 07 : 1. 68 : 1 allows the attainment of an interconnected matrix of Ti2AlN, with 25vol. ％ A12O3 formed simultaneously. The Vickers hardness and compression strength were measured at room temperature. The hardness of the composite is 9. 7 GPa which is more than twice that of pure Ti2 A1N (3. 5 GPa). The compression strength is 1. 8 GPa, which falls between those of pure Ti2AlN and A12O3. It is concluded that with the homogeneous dispersion of the A12O3 in the matrix, a high hardness of the composite can be achieved.
Metal ceramic Ti2AlN hot pressing
Zhuo Zheng Gang Wang Yuyou Cui Rui Yang
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
1567-1570
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）