燃烧合成TiB2-Cu金属陶瓷的抗烧蚀行为
Ablation-resistance of combustion synthesized TiB2-Cu cermet
利用Ti, B, Cu粉通过燃烧合成制备了TiB2-Cu金属陶瓷复合材料，该金属陶瓷中只含有两相：TiB2陶瓷相和金属Cu相。金属Cu的添加可以提高TiB2陶瓷的强度、断裂韧性、热膨胀系数以及热导率；通过等离子电弧加热器考察了TiB2-Cu金属陶瓷的热冲击和抗烧蚀行为；结果表明：纯TiB2陶瓷在等离子电弧作用下发生灾难性破坏，而在TiB2-Cu金属陶瓷材料表面没有发现裂纹出现；TiB2-Cu金属陶瓷在等离子电弧作用下质量损失率为4.09％，这和传统的W/Cu合金烧蚀性能非常接近；TiB2-Cu金属陶瓷烧蚀机理是金属Cu的挥发以及TiB2陶瓷的机械剥蚀，在实验和理论分析基础上建立了材料的抗烧蚀模型。
航空航天技术冶金技术金属学、热处理
TiB2-Cu金属陶瓷复合材料燃烧合成微观结构热冲击烧蚀机理
韩杰才,张幸红,徐强.燃烧合成TiB2-Cu金属陶瓷的抗烧蚀行为[EB/OL].(2005-01-10)[2025-09-24].http://www.paper.edu.cn/releasepaper/content/200501-32.点此复制
TiB2-Cu ceramic-metal composites were prepared by combustion synthesis of elemental titanium, boron and copper powders. The synthesized product consisted of two phases: TiB2 and copper. The addition of copper improved the strength and fracture toughness, thermal expansion coefficient and thermal conductivity of TiB2. Thermal shock and ablation resistances of TiB2-Cu composites were studied using a plasma torch arc heater. Monolithic TiB2 failed catastrophically when the plasma arc flow reached the specimen surface. However, no cracks were found on the ablation surface of the TiB2-Cu ceramic-metal composites. The fractional mass loss was 4.09 % for a TiB2-40Cu composite, which was close to the traditional W/Cu alloys. Volatilization of metal binder and mechanical erosion of TiB2 were observed to be the major ablation mechanisms. An ablation process model is proposed for the TiB2-Cu composites.
TiB2-Cu ceramic-metal composite combustion synthesis microstructure thermal shock resistance ablation mechanisms
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