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Nanocrystalline tantalum carbide reinforced silicon-boron-carbon-nitrogen complex phase ceramic material and preparation method thereof
The invention provides a nanocrystalline tantalum carbide reinforced silicon-boron-carbon-nitrogen complex phase ceramic material and a preparation method thereof. The preparation method comprises thefollowing steps: S1, preparing nanocrystalline tantalum carbide powder; S2, mixing the nanocrystalline tantalum carbide powder, hexagonal boron nitride, cubic silicon powder and graphite according toa preset ratio, and carrying out high-energy ball milling to obtain composite powder; and S3, carrying out hot pressing sintering on the composite powder to prepare the nanocrystalline tantalum carbide reinforced silicon-boron-carbon-nitrogen complex phase ceramic material. According to the invention, a silicon-boron-carbon-nitrogen ceramic is used as a matrix, and is added with a tantalum carbide reinforced phase to prepare a nanocrystalline tantalum carbide reinforced silicon-boron-carbon-nitrogen complex phase ceramic material, wherein the ultra-high temperature phase tantalum carbide particles are uniformly dispersed in the amorphous silicon-boron-carbon-nitrogen matrix in a nanocrystalline form so as to achieve pinning crack propagation effect and improve the mechanical properties ofthe silicon-boron-carbon-nitrogen ceramic, and tantalum carbide is used for reinforcing the silicon-boron-carbon-nitrogen ceramic due to the ultra-high temperature property, so that the high temperature resistance of the composite ceramic material is improved, and the composite ceramic material can be used at a high temperature.
本发明提供了一种纳米晶碳化钽增强硅硼碳氮复相陶瓷材料及其制备方法，上述制备方法包括以下步骤：S1：制备纳米晶碳化钽粉体；S2：按照预设比例将所述纳米晶碳化钽粉体、六方氮化硼、立方硅粉和石墨混合，后高能球磨，得到复合粉体；S3：将复合粉体热压烧结，制得纳米晶碳化钽增强硅硼碳氮复相陶瓷材料。本发明以硅硼碳氮陶瓷为基体，添加碳化钽增强相制备成纳米晶碳化钽增强硅硼碳氮复相陶瓷材料，超高温相碳化钽颗粒以纳米晶的形式均匀分散于非晶的硅硼碳氮基体当中，可起到钉扎裂纹扩展的作用，提高硅硼碳氮陶瓷的力学性能，同时碳化钽的超高温性质对硅硼碳氮陶瓷进行补强，提高复相陶瓷材料的耐高温性能，使其在可在更高的温度下服役。
Nanocrystalline tantalum carbide reinforced silicon-boron-carbon-nitrogen complex phase ceramic material and preparation method thereof
The invention provides a nanocrystalline tantalum carbide reinforced silicon-boron-carbon-nitrogen complex phase ceramic material and a preparation method thereof. The preparation method comprises thefollowing steps: S1, preparing nanocrystalline tantalum carbide powder; S2, mixing the nanocrystalline tantalum carbide powder, hexagonal boron nitride, cubic silicon powder and graphite according toa preset ratio, and carrying out high-energy ball milling to obtain composite powder; and S3, carrying out hot pressing sintering on the composite powder to prepare the nanocrystalline tantalum carbide reinforced silicon-boron-carbon-nitrogen complex phase ceramic material. According to the invention, a silicon-boron-carbon-nitrogen ceramic is used as a matrix, and is added with a tantalum carbide reinforced phase to prepare a nanocrystalline tantalum carbide reinforced silicon-boron-carbon-nitrogen complex phase ceramic material, wherein the ultra-high temperature phase tantalum carbide particles are uniformly dispersed in the amorphous silicon-boron-carbon-nitrogen matrix in a nanocrystalline form so as to achieve pinning crack propagation effect and improve the mechanical properties ofthe silicon-boron-carbon-nitrogen ceramic, and tantalum carbide is used for reinforcing the silicon-boron-carbon-nitrogen ceramic due to the ultra-high temperature property, so that the high temperature resistance of the composite ceramic material is improved, and the composite ceramic material can be used at a high temperature.
本发明提供了一种纳米晶碳化钽增强硅硼碳氮复相陶瓷材料及其制备方法，上述制备方法包括以下步骤：S1：制备纳米晶碳化钽粉体；S2：按照预设比例将所述纳米晶碳化钽粉体、六方氮化硼、立方硅粉和石墨混合，后高能球磨，得到复合粉体；S3：将复合粉体热压烧结，制得纳米晶碳化钽增强硅硼碳氮复相陶瓷材料。本发明以硅硼碳氮陶瓷为基体，添加碳化钽增强相制备成纳米晶碳化钽增强硅硼碳氮复相陶瓷材料，超高温相碳化钽颗粒以纳米晶的形式均匀分散于非晶的硅硼碳氮基体当中，可起到钉扎裂纹扩展的作用，提高硅硼碳氮陶瓷的力学性能，同时碳化钽的超高温性质对硅硼碳氮陶瓷进行补强，提高复相陶瓷材料的耐高温性能，使其在可在更高的温度下服役。
Nanocrystalline tantalum carbide reinforced silicon-boron-carbon-nitrogen complex phase ceramic material and preparation method thereof
一种纳米晶碳化钽增强硅硼碳氮复相陶瓷材料及其制备方法
YANG ZHIHUA (author) / WANG BINGZHU (author) / JIA DECHANG (author) / CAI DELONG (author) / LI DAXIN (author) / NIU BO (author) / LI HAILIANG (author) / DUAN WENJIU (author) / GUAN JINGYI (author) / ZHOU YU (author)
2020-06-02
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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