Combination of SHS and SPS techniques for fabrication of fully dense ZrB2-ZrC-SiC composites
Combination of SHS and SPS techniques for fabrication of fully dense ZrB2-ZrC-SiC composites
复制标题
DOI：
10.1016/j.matlet.2007.05.066
复制
发表时间：
2008-02
影响因子：
3
通讯作者：
R. Licheri;R. Orrú;C. Musa;G. Cao
中科院分区：
文献类型：
--
作者：
R. Licheri;R. Orrú;C. Musa;G. Cao
提出了一种制备全致密超高温陶瓷(UHTC)材料的新方法。首先采用自蔓延高温合成法(SHS)合成了体积分数为40%的ZrB2-40%ZRC-12体积%的碳化硅粉末，然后采用放电等离子烧结(SPS)对其进行了固结处理。具体地说，当从Zr、B4C、Si和石墨开始时，SHS技术将使反应物完全转化为所需的产品。此外，SPS设备的使用允许SHS粉末的完全固结。最高温度为1800℃，总反应时间为10min。与在相同的SPS条件下制备类似材料和加固工业用的ZrB2、ZRC和SiC3种材料的其他方法相比，所提出的方法特别快速和方便。
A novel method for the fabrication of fully dense ZrB 2-ZrC-SiC Ultra High Temperature Ceramic (UHTC) materials is proposed. It consists of first synthesizing ZrB 2-40 vol.% ZrC-12 vol.% SiC powders by Self-propagating High-temperature Synthesis (SHS) and subsequently consolidating them by Spark Plasma Sintering (SPS). Specifically, when starting from Zr, B 4 C, Si, and graphite, the SHS technique leads to the complete conversion of reactants to the desired product. In addition, the use of the SPS apparatus allows for the full consolidation of the SHS powders. This result is achieved under the optimal conditions of 10 min total time and with a maximum temperature of 1800 C. The proposed method is particularly rapid and convenient as compared to other techniques available for the preparation of analogous materials and for the consolidation of commercial ZrB 2, ZrC, and SiC, using the same SPS conditions.