Determination of phase composition and mechanical properties of surface of the material obtained on the basis of silicon and carbon by spark-plasma sintering method
Determination of phase composition and mechanical properties of surface of the material obtained on the basis of silicon and carbon by spark-plasma sintering method
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DOI：
10.3934/matersci.2019.1.1
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发表时间：
2019-01-01
影响因子：
1.8
通讯作者：
Wieleba, Wojciech
中科院分区：
文献类型：
--
作者：
Mukhamedova, Nuriya M.;Skakov, Mazhyn K.;Wieleba, Wojciech
测定了摩擦系数和耐磨性，研究了以硅、碳为基材的实验样品的X射线相组成。以工业二次产品为初始粉末，进行放电等离子烧结。通过计算确定了烧结料的组成为硅质量的75%、石墨质量的25%(碳基)。通过对以工业二次产品为初始成分的放电等离子烧结样品相组成的分析，得出以下结论：--放电等离子烧结样品均由金属硅相(立方晶格)、石墨相(六方晶格)、碳化硅立方和六方相组成，摩擦系数较低；-根据加热温度的不同，碳化硅相含量的质量分数从20%到30%；-发现提高样品的烧结温度对所获得的陶瓷材料的磨损强度有有利的影响；结果表明，随着碳化物相质量分数的增加，碳化硅陶瓷材料的耐磨性提高，摩擦因数和磨损量降低，形成了更致密的碳化硅骨架，在此基础上，通过相分析证明，随着烧结温度的升高，粉末组元之间的相互作用形成了更稳定的碳化硅骨架。
Friction coefficients and wear resistance are determined, and the x-ray phase composition of experimental samples of obtained material on the basis of silicon and carbon is studied in this paper. Secondary products of the industry were used as initial powder to conduct spark plasma sintering. The composition of burden used for sintering, which was 75% of the mass of silicon and 25% of the mass of graphite (carbon basis), was determined by calculation. Studied samples were obtained by spark plasma sintering method.Based on the analysis of results of the phase composition of the samples obtained by spark plasma sintering method using secondary products of the industry as the initial components, the following conclusions can be made:- It was found that all samples obtained by the method of spark plasma sintering consist of the following phases: The phase of metallic silicon (cubic crystal lattice), the phase of graphite (hexagonal crystal lattice), the phase of silicon carbide with cubic and hexagonal lattice and have a low coefficient of friction;- It was determined that the mass fraction of the silicon carbide phase content is from 20 to 30% depending on the heating temperature;- It was found that the increase in the sintering temperature of the samples have a beneficial effect on the wear intensity of obtained ceramic material;It was found that from the obtained samples of carbide silicon ceramics the wear resistance of the material increases and the friction coefficient and wear decrease due to an increase in the mass fraction of the carbide phase, that is, a more dense frame is formed.Based on the above, we can say that with an increase in the sintering temperature, the interaction of powder components forms a more stable frame of silicon carbide, which is proved by conducted phase analysis.