EFFECT OF SINTERING TEPMERATURE ON MICROSTRUCTURE OF Ti6A14V MATRIX COMPOSITES
(TiBw+TiCp)/Ti6A14V composites were fabricated by reactive hot-pressing at the temperature range of 800～1200℃ using the starting materials of TiB2, C and Ti6A14V powders. The XRD results suggested that the reaction between C and Ti happened 900℃ and above, while the reaction between TiB2 and Ti happen at 1100℃ and above. SEM results also suggested that the reaction between C and Ti was prior to that between TiB2 and Ti. With the increase of the sintering temperature, the size of TiC particle and TiB whisker reinforcements increased gradually. The TiC particle was formed at the boundaries of original Ti6A14V particles, while the TiB whiskers grew toward the inside of Ti6A14V particles, which resulted in a strong bonding between neighboring Ti6A14V particles. The results of hardness and relative density tests showed that the (TiBw+TiCp)/Ti6A14V composites sintered at 1100℃ had the highest hardness and relative density compared with that sintered at other temperatures.
Titanium alloy metal matriz composites sintering microstructure
LUJUN HUANG FUYAO YANG YONGLIANG GUO JIE ZHANG LIN GENG
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001
国际会议
第五届先进材料与加工国际会议(Fifth International Conference on Advanced Materials and Processing ICAMP-5)
哈尔滨
英文
1444-1448
2008-09-03（万方平台首次上网日期，不代表论文的发表时间）