Sun Jian, Jiang Boyi, Li Wanzhong, Cheng Xiaole, Liu Hui, Li Ziyang
School of Mechanical and Electrical Engineering, Xi'an Polytechnic University, Xi'an 710048, China.
Xi'an Key Laboratory of Modern Intelligent Textile Equipment, Xi'an 710048, China.
Materials (Basel). 2022 Mar 25;15(7):2424. doi: 10.3390/ma15072424.
Synthetic diamond particle-reinforced copper-iron composites (SD/Cu-Fe) were produced by the powder metallurgical method for stone cutting applications, and the microstructure, density, compactness, hardness, flexure strength, and wear resistance of the composites were characterized in this work. The results showed that the diamond particles were relatively uniformly distributed in most areas of the copper matrix and the crystal shape of diamond particles were relatively intact in the sintering temperature range from 740 °C to 780 °C. The interfaces between the diamond particles and copper matrix, as well as the interfaces between the copper matrix and iron layer, were well bonded without significant gaps. The physical properties of composites increased first and then decreased with the sintering temperature. When the sintering temperature was 770 °C, the related properties reached the best. Diamond played a key role in improving the properties of the SD/Cu-Fe sandwich composite. This work provides a basis for the research and development of high-performance diamond-reinforced copper-based iron sandwich composites.
采用粉末冶金法制备了用于石材切割的人造金刚石颗粒增强铜铁复合材料（SD/Cu-Fe），并对该复合材料的微观结构、密度、致密度、硬度、抗弯强度和耐磨性进行了表征。结果表明，在740℃至780℃的烧结温度范围内，金刚石颗粒在铜基体的大部分区域分布相对均匀，且金刚石颗粒的晶体形状相对完整。金刚石颗粒与铜基体之间的界面以及铜基体与铁层之间的界面结合良好，无明显间隙。复合材料的物理性能随烧结温度先升高后降低。当烧结温度为770℃时，相关性能达到最佳。金刚石在改善SD/Cu-Fe三明治复合材料性能方面起关键作用。该工作为高性能金刚石增强铜基铁三明治复合材料的研发提供了依据。
