Preparation of Ti-coated diamond particles by microwave heating

Quanchao Gu, Jinghui Peng, Lei Xu, C. Srinivasakannan, Libo Zhang, Yi Xia, Qingtian Wu, Hongying Xia

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Depositing strong carbide-forming elements on diamond surface can dramatically improve the interfacial bonding strength between diamond grits and metal matrix. In the present work, investigation on the preparation of Ti-coated diamond particles by microwave heating has been conducted. The morphology, microstructure, and the chemical composition of Ti-coated diamond particles were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive x-ray spectrometer (EDX). The thickness of Ti coating was measured and the interfacial binding strength between Ti coating and diamond was analyzed. The results show that the surface of the diamond particles could be successfully coated with Ti, forming a uniform and continuous Ti-coated layer. The TiC was found to form between the surface of diamond particles and Ti-coated layer. The amount of TiC as well as the thickness of coating increased with increasing coating temperature, furthermore, the grain size of the coating also grew gradually. The interfacial bonding strength between coating and diamond was found to be best at the temperature of 760 °C.

Original languageBritish English
Pages (from-to)909-916
Number of pages8
JournalApplied Surface Science
Volume390
DOIs
StatePublished - 30 Dec 2016

Keywords

  • Diamond
  • Microwave heating
  • Surface metallization
  • Titanium coating

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