Study on the Microstructure and Mechanical Properties of Diamond Particle-Reinforced Copper-Iron Sandwich Composites Prepared by Powder Metallurgy

Abstract

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.

Microstructure and Mechanical Properties of Structural Steels and Alloys

“…Stress distribution as well as factors affecting stress concentration around a spherical cavity embedded in a cylinder is detailed by Abdelghani et al [ 9 ]. Sun et al presented a study on particle-reinforced copper–iron composites prepared via powder metallurgy [ 10 ].…”

Production of Cu/Diamond Composite Coatings and Their Selected Properties

“…In this work, the main focus was to determine the effect of diamond incorporation on the structure, mechanical properties, bonding of coatings to the substrate, and the solderability of such coatings. So far, works on the mechanical properties of composite materials have focused on composites produced by various methods, including gas pressure infiltration [ 25 ], combining flake powder metallurgy and vacuum hot-press sintering [ 26 ], powder metallurgy [ 27 , 28 ], and cold spraying [ 29 ]. The use of chemical or electrochemical plating methods is uncommon.…”