Affiliation:
1. Mechanical and Electronic Engineering Department, Shandong Agriculture and Engineering University, Shandong, 250100, P. R. China
Abstract
This work is based on the dry sliding wear of the MgAl 2 C 2- TiB 2- FeSi composite coating deposited on a pure Ti using a laser cladding technique. Scanning electron microscope images indicate that the nanocrystals and amorphous phases are produced in such coating. X-ray diffraction result indicated that such coating mainly consists of MgAl 2 C 2, Ti - B , Ti - Si , Fe - Al , Ti 3 SiC 2, TiC and amorphous phases. The high resolution transmission electron microscope image indicated that the TiB nanorods were produced in the coating, which were surrounded by other fine precipitates, favoring the formation of a fine microstructure. With increase of the laser power from 0.85 kW to 1.00 kW, the micro-hardness decreased from 1350 ~ 1450 HV0.2 to 1200 ~ 1300 HV0.2. The wear volume loss of the laser clad coating was 1/7 of pure Ti .
Publisher
World Scientific Pub Co Pte Lt
Subject
Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics