Open AccessMETAL-MATRIX COMPOSITES AND THERMAL SPRAY COATINGS FOR EARTH MOVING MACHINES
Author(s) -
Matthew T Kiser
Publication year - 2001
Language(s) - English
Resource type - Reports
DOI - 10.2172/828639
Subject(s) - materials science , thermal spraying , powder metallurgy , metallurgy , coating , composite number , casting , composite material , particle (ecology) , gas dynamic cold spray , metal matrix composite , microstructure , oceanography , geology
In the third quarter, progress was made for steel MMCs in the areas of hard particle preform fabrication and in pressure casting, while for thermal spray coatings additional arc-lamp processing trials were executed. For the steel matrix composite effort, a powder metallurgy technique was demonstrated for making hard particle preforms. Initial casting trials were conducted primarily with cemented carbide particles. As with previous efforts to make ferrous matrix cemented carbide composites, particle dissolution during casting will be a challenge which will have to be overcome to reach toughness and performance targets. For thermal spray coatings, lamp processing trials were conducted on number of material systems. In most cases the coatings are being positively modified by lamp processing. In some coating systems metallurgical bonding was created at the coating/substrate interface. An overview of the progress during the 3rd quarter of this project is given. Research details are provided in the limited rights appendix to this report