High-strength porous titanium diboride ceramics: Microstructure and mechanical properties
High-strength porous titanium diboride ceramics: Microstructure and mechanical properties
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DOI：
10.1243/09544100jaero398
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发表时间：
2008-07
期刊：
影响因子：
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通讯作者：
C. Hong;J. C. Han;X. H. Zhang;S. Meng
中科院分区：
文献类型：
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作者：
C. Hong;J. C. Han;X. H. Zhang;S. Meng
摘要采用冷等静压法对TiB2粉末进行压实，然后进行无压烧结，制备了多孔TiB2陶瓷。研究了材料的显微组织特征、相对密度、抗弯强度和断裂韧性。实验结果表明，根据烧结温度和初始压实压力的不同，制备的多孔TiB2的孔隙率在~ 50%到~ 84%之间可控。随着相对密度的增加，材料的抗弯强度和断裂韧性得到提高。烧结多孔TiB2的力学性能的提高主要是由于颈部结合和生长的增强。
Abstract Porous TiB2 ceramics have been fabricated by compacting TiB2 powders with cold isostatical pressing, followed by pressureless sintering. The microstructural feature, relative density, flexural strength, and fracture toughness were investigated. The experimental results revealed that the porosity of the fabricated porous TiB2 was controllable between ∼ 50 and ∼ 84 per cent depending on the sintering temperature and initial compacted pressures. The flexural strength and fracture toughness were improved with the increased relative density. The improved mechanical properties of the sintered porous TiB2 were attributed to the enhanced neck bonding and growth.