Cemented tungsten carbide with ultra fine grains was prepared via microwave sintering.η phase（W3Co3C） was formed on the surface of the samples during the preparation process.Extra carbon black was premixed and the ...Cemented tungsten carbide with ultra fine grains was prepared via microwave sintering.η phase（W3Co3C） was formed on the surface of the samples during the preparation process.Extra carbon black was premixed and the influence of carbon content on mechanical properties was studied.The results show that the maximum value of hardness and transverse rupture strength are HRA 93.2 and 3396 MPa respectively when the carbon black content is 0.45%.The microstructure investigated by SEM show that the WC grains growth mainly occurs during the early stage of microwave sintering by the coalescence of grains.展开更多
基金Project (2008890) supported by the Scientific Research Foundation for the Returned Overseas Chinese Scholars,China
文摘Cemented tungsten carbide with ultra fine grains was prepared via microwave sintering.η phase（W3Co3C） was formed on the surface of the samples during the preparation process.Extra carbon black was premixed and the influence of carbon content on mechanical properties was studied.The results show that the maximum value of hardness and transverse rupture strength are HRA 93.2 and 3396 MPa respectively when the carbon black content is 0.45%.The microstructure investigated by SEM show that the WC grains growth mainly occurs during the early stage of microwave sintering by the coalescence of grains.
基金National Natural Science Foundation of China(51164015)Science and Technology Innovation Team of Kunming City(2012-01-01-A-R-07-0005)+1 种基金Scientific and Technological Cooperative Project(2012IB002)Key Basic Research Project of Yunnan Province(2011FA026)
