论文部分内容阅读
采用热压烧结工艺制备了氧化钇掺杂Zr B2-Si C陶瓷基复合材料,利用高频等离子体电弧风洞对氧化钇掺杂Zr B2-Si C进行了2300℃和2400℃的抗氧化烧蚀性能测试,分析了氧化钇对陶瓷材料抗烧蚀性能的影响,探讨了稀土氧化物掺杂Si C-Zr B2陶瓷材料的抗烧蚀机理。结果表明,在升温及降温过程中均未开裂,材料具有较好的抗热冲击性能,质量烧蚀率分别为0.0344 g/s和0.0365 g/s,氧化层厚度分别为1 mm和2 mm,表面烧蚀中心和边缘的氧化产物分别为低温稳定相Zr O2和Si O2,氧化层结构仍旧是连续的,体现了材料较好的抗氧化烧蚀性能。
Y2O3 doped ZrB2-SiC ceramic matrix composites were prepared by hot-pressing sintering process. The high-frequency plasma arc wind tunnel was used to oxidize yttrium-doped Zr B2-Si C at 2300 ℃ and 2400 ℃ The influence of the yttrium oxide on the ablation resistance of the ceramic material was analyzed. The ablation resistance mechanism of the rare earth oxide doped Si C-Zr B2 ceramic material was also discussed. The results show that the material has good thermal shock resistance, the mass ablation rates are 0.0344 g / s and 0.0365 g / s respectively, and the thickness of oxide layer is 1 mm and 2 mm, respectively. The oxidation products of the surface ablation center and the edge are the low-temperature stable phases ZrO2 and SiO2, respectively. The oxide layer structure is still continuous, which reflects the good anti-oxidation ablation performance of the material.