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Synthesis and properties of hot pressed B4C–TiB2 ceramic composite

groupmaster 添加于 2010-10-31 21:26 | 2106 次阅读 | 0 个评论

作者
Yue XY, Zhao SM, Lü P, Chang Q, Ru HQ
摘要
In order to improve the fracture toughness of B4C ceramics, B4C–TiB2 composite was prepared by hot pressing using B4C, C and TiCl4 as starting materials. The precursor powders of Ti(OH)4 and B4C were obtained using co-precipitation method. The phases, mechanical properties and microstructures of the B4C–TiB2 composite were investigated. The results showed that Ti(OH)4 almost converted into rutile TiO2 phase at 573 K for 1 h. The B4C–TiB2 composite with 43 mass% TiB2 showed the optimized mechanical properties. The optimum relative density, hardness, flexural strength and fracture toughness were 99.8%, 23.6 GPa, 506 MPa and 9.4 MPa m1/2, respectively. A number of twins and nanosecond-phase particles were observed in the B4C–TiB2 composite.
详细资料
- 文献种类:期刊
- 期刊名称: Materials Science and Engineering: A
- 期刊缩写: Materials Science and Engineering: A
- 期卷页: 2010年第527卷第27-28期 7215-7219页
- ISBN: 0921-5093
所属群组

金属材料 材料学+第一性原理计算
标签

B4C TiB2 co-precipitation HP reactive
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