Recent developments on WC-based bulk composites
Recent developments on WC-based bulk composites
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DOI：
10.1007/s10853-010-5046-7
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发表时间：
2011-02
影响因子：
4.5
通讯作者：
A. Mukhopadhyay;B. Basu
中科院分区：
文献类型：
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作者：
A. Mukhopadhyay;B. Basu
为了提高WC基硬质合金的性能和性能，研究工作集中在纳米结构硬质合金的开发上。随着近年来用于合成纳米粉末的“喷雾转化工艺”的发展以及放电等离子烧结技术的出现，已经可以成功开发出具有更高硬度和耐磨性的块状纳米结构硬质合金。另一方面，认识到金属粘结相的存在对 WC 基金属陶瓷的某些应用有害这一事实，导致最近人们对通过用陶瓷烧结添加剂代替金属粘结相来开发新型“无粘结剂”WC 基陶瓷的兴趣激增。最近，已经可以开发出致密的WC基陶瓷复合材料，在没有金属粘结相的情况下断裂韧性不会显着恶化。从上述角度来看，本综述主要关注纳米结构WC基金属陶瓷和无粘结剂WC基陶瓷复合材料的加工和表征的最新研究成果。
In order to achieve improved properties and performance with WC-based cemented carbides, research efforts have been directed towards the development of nanostructured cemented carbides. With the recent development of ‘spray conversion process’ for synthesizing nanosized powders and the advent of spark plasma sintering technique, it has been possible to successfully develop bulk nanostructured cemented carbides, possessing improved hardness and wear resistance. On a different note, realisation of the fact that the presence of metallic binder phase is deleterious towards certain applications of WC-based cermets has led to a recent surge of interest towards the development of novel ‘binderless’ WC-based ceramics by replacing the metallic binder phase with ceramic sinter-additives. More recently, it has been possible to develop dense WC-based ceramic composites without considerable deterioration of fracture toughness in the absence of the metallic binder phase. In the above perspective, the present review focuses mainly on the recent research results concerned with the processing and characterisation of nanostructured WC-based cermets and binderless WC-based ceramic composites.