Abstract
In this study, an effective way of applying Ti/Ni deposited coating to the surface of diamond single crystal particles by magnetron sputtering was proposed and novel high-entropy alloy (HEA)/diamond composites were prepared by spark plasma sintering (SPS). The results show that the interfacial bonding state of the coated diamond composite is obviously better than that of the uncoated diamond composite. Corresponding mechanical properties such as hardness, density, transverse fracture strength and friction properties of the coated diamond composite were also found to be better than those of the uncoated diamond composite. The effects of interface structure and defects on the mechanical properties of HEA/diamond composites were investigated. The research directions for further improving the structure and properties of high-entropy alloy/diamond composites were proposed.
Highlights
Multi-principal high-entropy alloys break through the traditional alloy design mode based on one kind of alloy element
Based on the excellent properties of high-entropy alloys (HEAs) and diamond, it is of great scientific value and application significance to design a novel high-entropy metal matrix binder for diamond tools and to develop the corresponding theory and technology of heterogeneous multi-phase interface control [10,11,12]
Matrix and diamond particles and effectively controlling the reaction products of the HEA/diamond interface are important for improving the interface bonding and overall application performance of diamond tools
Summary
Multi-principal high-entropy alloys break through the traditional alloy design mode based on one kind of alloy element. Cr, Mo, V and other strong carbide-forming elements were always selected as coating materials [13,14,15], which can form a carbide layer on the surface of diamond particles to realize metallurgical bonding between diamond and the matrix. The ideal structure of metallurgical bonding between diamond particles and a metal matrix involves avoiding the formation of carbides. Ti/Ni the interface [16,17].a the ideal structure of metallurgical bonding between diamond particles coating and the spark plasma sintering method. This interface can effectively reduce the interface energy between diamond density the matrix composites and improve the strength, toughness and hand, other the mechanical properties of and theof. The interface after SPS can be filled by generated carbides to improve the density of the composites and improve the strength, toughness and other mechanical properties of the composites
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
