| Ti对C－B_4C－SiC复合材料显微结构与性能的影响 |
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| 引用本文： | 黄启忠,杨巧勤,杜海清,黄伯云,吕海波.Ti对C－B_4C－SiC复合材料显微结构与性能的影响[J].无机材料学报,1995(4). |
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| 作者姓名： | 黄启忠 杨巧勤 杜海清 黄伯云 吕海波 |
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| 作者单位： | 中南工业大学粉末冶金研究所，湖南大学 |
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| 摘 要： | 本文就烧结助剂Ｔｉ对Ｃ－Ｂ４Ｃ－ＳｉＣ碳／陶复合材料显微结构与性能的影响进行了研究，Ｘ射线衍射表明Ｔｉ在烧结温度下与Ｂ发生反应在晶界生成ＴｉＢ２，并产生液相，有效地促进了Ｃ－Ｂ４Ｃ－ＳｉＣ复合材料的烧结，抑制了晶粒的长大，使复合材料密度与强度大幅度地增加，电阻率下降；同时ＴｉＢ２在氧化时生成致密的ＴｉＯ２，包裹了易氧化的Ｂ４Ｃ和Ｃ，使制品难氧化，从而大大提高了制品的抗氧化性能．
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| 关 键 词： | 烧结助剂，碳／陶复合材料，显微结构与性能 |
The Effect of Titanium on the Microstructure and Properties of C-B_4C-SiC Composite |
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| Huang Qizhong, Yang Qiaoqin, Du Haiqing, Huang Boyun, Lu Haibo.The Effect of Titanium on the Microstructure and Properties of C-B_4C-SiC Composite[J].Journal of Inorganic Materials,1995(4). |
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| Authors: | Huang Qizhong Yang Qiaoqin Du Haiqing Huang Boyun Lu Haibo |
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| Abstract: | The effect of additive titanium on the microstructure and properties of C-B4C-SiC composite was studied, X-ray diffraction indicated that Ti reacted with B to form TiB2 under the sintering temperature.A liquid phase was formed at the grain boundary and then sintering process was accelerated, the growth of grain controlled. Consequently, the density and strength of the composite increased markedly, but the specific resistance decreased a little. On the other hand, when the composite was oxidized , TiB2 was at first oxidized to dense TiO2 which wrapts up carbon and B4C particles, making them difficult to be oxidized. So the oxidation resistance of the composite increased greatly. |
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| Keywords: | additives carbon/ceramics composite microstructure and properties |
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