Microstructure and wear behaviour of laser-induced thermite reaction Al2O3ceramic coating on AA7075 aluminum alloy

Kaijin Huang, Xin Lin, Changsheng Xie, Tai Man Yue

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

The microstructure and wear behaviour of the thermite reaction coating produced by the hybrid laser cladding-remelting on AA7075 aluminum alloy for the systems of Al-CuO-SiO2, Al-Cr2O3-SiO2, Al-Fe2O3-SiO2, and Al-TiO2-SiO2were studied. The results of the X-ray diffraction (XRD) analysis show that in all the four reaction coatings, α-AI2O3and γ-Al2O3phases were present at the top surface, together with various intermetallic phases, the corresponding reduced metal and Al phase in the fusion zone. Under the dry sliding condition, the wear resistance, in terms of weight loss, of the laser-clad specimens was considerably higher than that of the untreated specimen. The predominant wear mechanism of the former specimens was abrasive wear, while for the latter, it was the adhesive wear that prevailed.
Original languageEnglish
Pages (from-to)201-206
Number of pages6
JournalJournal of Materials Science and Technology
Volume23
Issue number2
Publication statusPublished - 1 Mar 2007

Keywords

  • Aluminum alloy
  • Laser cladding
  • Thermite reaction
  • Wear

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Metals and Alloys
  • Materials Chemistry

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