Microstructure and wear properties of silicide based coatings over Mo-30W alloy

作者：Paul Bhaskar^*; Limaye P K; Hubli R C; Suni A K

来源：International Journal of Refractory Metals and Hard Materials, 2014, 44: 77-83.

DOI：10.1016/j.ijrmhm.2014.01.013

• Pack cementation
• Oxidation resistant
• Wear
• Coefficient of friction

The paper deals with the microstructure and wear properties of the Mo-30W alloy, coated with suicide based oxidation resistant coatings using pack cementation technique. The microstructure of the coating revealed that the coating was free of cracks or pores, adherent to the substrate and comprised of either single layer or double layer depending the coating temperature. Scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) was used to determine diffusion profiles for Mo, Wand Si. Reciprocating sliding wear and friction experiments were performed on the uncoated and coated alloy. Double layer coating showed an improved friction coefficient as compared to base alloy as well as a single layer coated alloy. The wear tests also showed a marked improvement of wear resistance of coated alloy as compared to uncoated alloy. The coating was found to be wear resistant at 7 N.

• 出版日期2014-5