|About this Abstract
||Materials Science & Technology 2012
||Coatings for Corrosion and Wear Resistance Applications
||Tribological Performance of Cr Coatings Produced by Halide Activated Pack Cementation
||Joseph Hamann, Benton J Weibel
|On-Site Speaker (Planned)
Although halide activated pack cementation (HAPC) has been applied to improve the high temperature oxidation resistance of refractory alloys, HAPC has not been widely utilized to improve tribological properties of ferrous alloys. Here, HAPC has been used to produce a Cr-enriched layer on 52100 steel for the purpose of improving sliding wear behavior. The measured wear rate of the Cr-enriched surface was 2 x 10<SUP>-5</SUP> mm<SUP>3</SUP>/N/m compared to 4 x 10<SUP>-4</SUP> mm<SUP>3</SUP>/N/m of the substrate against a spherical 52100 steel counterbody. Moreover, nanoindentation of the Cr-enriched coating shows a 4x increase in hardness relative to the substrate material. SEM and EDS analyses were applied to assess the growth behavior of the Cr coating and were used to compare wear modes of coated and uncoated substrates. Our studies demonstrate improved tribological properties of 52100 steel through application of HAPC, and discuss changes in tribological mechanisms with variation in pressure and velocity.
||Definite: A CD-only volume