摘要
以3TiH2 B4C和11TiH2 3B4C系统为原料,采用热等静压原位合成工艺制备TiB2 TiCx复相陶瓷材料.XRD分析表明,3TiH2 B4C系统的反应产物为TiB2和TiC,11TiH2 3B4C系统的反应产物除了TiB2和TiCx外还有中间相Ti3B4.SEM断口形貌分析发现,3TiH2 B4C系统反应产物的显微组织不均匀,局部区域晶粒长大为板条状;11TiH2 3B4C系统产物的显微组织均匀,并且晶粒均为板条状.性能测试显示11TiH2 3B4C系统制备的TiB2 TiCx复相陶瓷材料具有较好的综合力学性能.
TiB2-TiC ceramic matrix composites were fabricated by in situ synthesis under hot isostatic pressing (HIP) with 3TiH2-B4C and 11TiH2-3B4C being the raw materials, respectively. The XRD analysis indicates that the samples synthesized from 3TiH2-B4C have TiB2 and TiC phases, while those from 11TiH2-3B4C have not only TiB2 and TiC phases, but also Ti3B4 phase. SEM results show that the microstructures of the composites synthesized from 3TiH2-B4C are not well-distributed, and there are some platelet grains in some zones, while those from 11TiH2-3B4C are fine with many regular-platelet grains. TiB2-TiCx ceramic matrix composites obtained from 11TiH2-3B4C have better mechanical properties than those from 3TiH2-B4C.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2004年第1期131-134,共4页
Journal of Southwest Jiaotong University
