Topic
Carbide
About: Carbide is a research topic. Over the lifetime, 36331 publications have been published within this topic receiving 503586 citations.
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TL;DR: In this article, the microstructure and thermal properties of the composites prepared by a vacuum pressure infiltration method were investigated and a promising approach to improve performance of diamond reinforced metal matrix composites by selecting carbide as an interface modifier was proposed.
114 citations
TL;DR: In this article, the friction and wear behavior of cermets/steel rubbing pairs were investigated. Friction and wear tests were carried out using three different cremets on the base of tungsten, titanium and chromium carbides under dry sliding conditions against steel disk (0.45% C).
114 citations
Patent•
22 Apr 1976TL;DR: In this article, a method of making a dense silicon carbide ceramic is disclosed involving the steps of homogeneously dispersing silicon carbides with a sufficient amount of a boron containing additive and a carbonaceous additive, forming the powder mixture into a shaped green body and then sintering the body in a controlled atmosphere and in the absence of external pressure at a temperature of about 1900°-2100° C.
Abstract: A method of making a dense silicon carbide ceramic is disclosed involving the steps of homogeneously dispersing silicon carbide with a sufficient amount of a boron containing additive and a carbonaceous additive, forming the powder mixture into a shaped green body and then sintering the body in a controlled atmosphere and in the absence of external pressure at a temperature of about 1900°-2100° C. such that density of the body is at least 85% of the theoretical density of silicon carbide. The complex shaped silicon carbide product formed thereby is also disclosed.
114 citations
TL;DR: In this paper, the microstructures formed during powder processing and spraying were analyzed using several analytical techniques, including X-ray diffraction, Auger electron spectroscopy and energy-dispersive spectrograms in a transmission electron microscope.
Abstract: Sand erosion tests were performed on WC-Co and WC-CoCr coatings deposited by the high velocity oxy-fuel spraying method. Several analytical techniques, including X-ray diffraction, Auger electron spectroscopy and energy-dispersive spectroscopy in a transmission electron microscope were used to characterize the microstructures formed during powder processing and spraying. It was found that a substantial fraction of WC decomposed into W2C or reacted with the cobalt matrix to form ternary carbides such as Co3W3C and other mixed compounds. In both cases the binder phase had a nanocrystalline structure of size 4-8 nm containing tungsten, cobalt, carbon and chromium elements. The addition of chromium inhibits to a large extent the decomposition of WC and avoids the formation of metallic tungsten. In addition, chromium improved the erosion resistance by several times compared with the WC-Co coating. Scanning electron microscopy showed that the CoCr matrix binds carbides better than the cobalt matrix, thereby inhibiting carbide loss at the spray particle boundaries. The hydroabrasive wear behaviour of coatings and the mechanisms for material removal are discussed with respect to the microstructures formed during spraying.
114 citations
113 citations