中文

Effect of diffusion barrier and interfacial strengthening on the interface behavior between high entropy alloy and diamond

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  • Release time:2021-08-02

  • DOI number:10.1016/j.jallcom.2020.157023

  • Journal:Journal of Alloys and Compounds

  • Key Words:High entropy alloys, Diamond, Interfaces, Diffusion, Carbides

  • Abstract:The double effect of diffusion barrier and interfacial strengthening on the interface behavior in a Ticoated diamond and high entropy alloy (HEA) composite was investigated. The first-principles simulations exhibited that the in-situ formed TiC played a significant role as a diffusion barrier between diamond and HEA matrix, resulting in the reduction of sp2 hybridization of diamond and enhanced the interface bonding strength. The simulation results were further confirmed by experiments. In Ti-coated diamond-HEA composite fabricated by selective laser melting, the TiC layer obstructed the direct contact between diamond particles and the transition metal elements in HEA, thus preventing graphitization of diamond and enhancing the interface bonding strength. Moreover, part of Ti in Ti coating entered into the HEA matrix and increased the lattice distortion, resulting in substitutional solution strengthening effect and improving the retention on diamond abrasives. The superior wear properties of Ti-coated diamond composite attributed to the diffusion barrier of TiC and interfacial strengthening of TiC and Ti containing HEA solid solution.

  • First Author:彭英博

  • Indexed by:Journal paper

  • Correspondence Author:张伟

  • Document Code:157023

  • Discipline:Engineering

  • First-Level Discipline:Materials Science and Engineering

  • Document Type:J

  • Volume:852

  • Translation or Not:no

  • Date of Publication:2020-09-06

  • Included Journals:SCI


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