Adv. Search
Journal of Inorganic Materials

Journal of Inorganic Materials

• Research Paper • Previous Articles     Next Articles

Ceramic Coatings on TC4 Titanium Alloy Deposited by AC Microarc Oxidation

XUE Wen-Bin1; 2; WANG Chao1,2; DENG Zhi-Wei1,2; LIX Zhi3   

  1. 1.; Key Laboratory for Radiation Beam Technology and Materials Modification; Institute of Low Energy Nuclear Physics; Beijing Normal University; Beijing 100875; China; 2. Beijing Radiation Center; Beijing 100875; 3. State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2001-02-23 Revised:2001-04-16 Published:2002-03-20 Online:2002-03-20

PDF (PC)

1077

Cited

35

Abstract: An oxide coating on TC4 Titanium alloy was prepared in an aluminate solution by the alternating-current
microarc oxidation (MAO) method. The microhardness (H) and elastic modulus (E) of the MAO ceramic coating were determined by the mechanical
properties microprobe. The influence of microarc discharge on microstructure and properties of the coating and alloy substrate were discussed. The
microarc discharge process has hardly influence on the microstructure of the alloy substrate. No oxygen atoms from the solution diffuse into the unoxidized
titanium substrate. The hardness and elastic modulus profiles of the MAO coating are similar. From the coating surface to the interior of the
coating, H and E gradually increase. H and E can reach maximum values of 13GPa and 230GPa respectively in the coating near the interface.
The changes in relative contents of TiO2 rutile and TiAl2O5 spinel along the coating thickness determine H and E profiles in the
coating.

Key words: microarc oxidation: titanium alloy, microhardness, elastic modulus

CLC Number: