Progress in pressureless sintering of boron carbide ceramics – a review
Progress in pressureless sintering of boron carbide ceramics – a review
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DOI：
10.1080/17436753.2019.1574285
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发表时间：
2019-02
影响因子：
2.2
通讯作者：
Wei Zhang;S. Yamashita;H. Kita
中科院分区：
文献类型：
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作者：
Wei Zhang;S. Yamashita;H. Kita
碳化硼（B4C）陶瓷具有极高的硬度、低密度、高熔点、高弹性模量、高热电动势、高耐化学性、高中子吸收截面、高冲击性和优异的耐磨性等许多优异的性能。因此，B4C陶瓷可用于各种工业应用，如轻质陶瓷铠装、高温热电偶、中子吸收剂、核电工程中的反应堆控制棒、硬质材料的抛光介质、研磨和磨削用的磨料介质以及耐磨部件（喷砂喷嘴、模具尖端和砂轮）。无压烧结是B4C陶瓷具有工业化应用价值的方法，但无压烧结无法将纯B4C陶瓷在无添加剂的情况下烧结至高密度。因此必须使用烧结添加剂来促进B4C陶瓷的致密化。本文将介绍用于促进碳化硼致密化的不同烧结添加剂，包括碳添加剂、金属添加剂、氧化物添加剂、非氧化物添加剂、组合添加剂和稀土氧化物添加剂。最后，还将提出B4C陶瓷的烧结方法和烧结添加剂的最新研究趋势。
Boron carbide (B4C) ceramics has many outstanding performance, such as extremely high hardness, low density, high melting point, high elastic modulus, high thermoelectromotive force, high chemical resistance, high neutron absorption cross section, high impact and excellent wear resistance. Therefore, B4C ceramics can be used in various industrial applications, such as lightweight ceramic armour, high temperature thermocouples, neutron absorber, reactor control rods in nuclear power engineering, polishing media for hard materials, abrasive media for lapping and grinding, and wear resistant components (blasting nozzles, die tips and grinding wheels). Pressureless sintering is the method with industrialised application value for B4C ceramics, however, it is impossible to sinter pure B4C ceramics to high densities without additives by pressureless sintering. So sintering additives must be used to promote the densification of B4C ceramics. The different sintering additives used to promote the densification of boron carbide will be described in this review, including carbon additives, metallic additives, oxide additives, non-oxide additives, combined additives and rare earth oxide additives. Finally, the recent research trends for sintering methods and sintering additives of B4C ceramics will also be proposed.