Rare Earth Compounds in Cemented Carbides with Trace Rare Earth Additions

摘要

The morphology,structure and distribution of the rare earth compounds in the YG8R.YT5R and YT14Rcemented carbides with additions of trace light rare earths were studied with an analytical electron microscope.The particles of the rare earth compounds in these alloys are all spherical and distribute at interfaces betweenthe Co-cement phase and WC hard phase or（TiW）C solid solution,and in the（TiW）C solid solution.In theYG8R and YTI4R alloys,the rare earth compound is RE2O3 with a bcc structure,while in the YT5R alloy.the rare earth compound is RE2O2S with a hcp structure.