Molybdenum-cobalt-boron ternary boride base metal ceramic material and preparation method thereof

The invention discloses a molybdenum-cobalt-boron ternary boride base metal ceramic material and a preparation method thereof. The process comprises the following steps: simple-substance molybdenum powder, cobalt powder and boron powder are used raw materials for ball-mill mixing, drying, formation...

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Main Authors ZHANG CONG, LIU GUOQUAN, XU ZHIFENG, JIANG XUE, ZHANG TONG, YIN HAIQING, QU XUANHUI, ZHANG RUIJIE
Format Patent
LanguageChinese
English
Published 13.04.2018
Subjects
ALLOYS
CASTING
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Summary:The invention discloses a molybdenum-cobalt-boron ternary boride base metal ceramic material and a preparation method thereof. The process comprises the following steps: simple-substance molybdenum powder, cobalt powder and boron powder are used raw materials for ball-mill mixing, drying, formation and sintering to prepare ternary boride base metal ceramic; a main phase is a MoCoB type diboride with an orthorhombic structure; contained hard phases are two similarly stable MoCoB phases; and bonded phases are Co or CoB compounds or solid solution of the two. The boron content (the atomic ratio B/Mo is more than 1.1) is increased in the ratio; the liquid phase appearance temperature of a ternary system is reduced; the sintering temperature is reduced; the preparation process is simplified; the cost is reduced; more excellent phase structures can be obtained through low-temperature sintering; and the oriented growth of grains is prevented. The Rockwell hardness is not lower than 83.5 HRA.The material can serve as
Bibliography:Application Number: CN201711065933