MOSi2 laser cladding - a comparison between two experimental procedures: Mo-Si online combination and direct use of MOSi2

There are very strong interests in developing low density advanced material systems for service at temperatures up to 1300 degreesC. These materials s hould mainly have moderate fracture toughness at low and intermediate tempe ratures and should exhibit oxidation resistant behaviour. The intermetallic compound, MoSi2 has been considered to be an attractive candidate due to i ts melting point (2030 degreesC) and excellent oxidation resistance at high temperatures. In this paper, we compare the results obtained with two diff erent techniques for laser cladding, one using an online combination betwee n Mo and Si powders, the second using direct injection of the MoSi2 powder. (C) 2001 Published by Elsevier Science Ltd.