Composites based on Ti[B.sub.2]-SiC with a nickel-chromium matrix

New [TiB.sub.2]-SiC composite materials with a nickel-chromium matrix are obtained. The process parameters of hot pressing of these advanced materials are optimized and their structure and mechanical properties are studied. The tribotechnical parameters and wear mechanism of these composites are est...

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Bibliographic Details
Published inPowder metallurgy and metal ceramics Vol. 50; no. 11-12; p. 719
Main Authors Storozhenko, M.S, Umanskii, A.P, Lavrenko, V.A, Chuprov, S.S, Kostenko, A.D
Format Journal Article
LanguageEnglish
Published Springer 01.03.2012
Subjects
Composite materials industry
Mechanical properties
Nickel alloys
Silicon carbide
Sintering
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Summary:New [TiB.sub.2]-SiC composite materials with a nickel-chromium matrix are obtained. The process parameters of hot pressing of these advanced materials are optimized and their structure and mechanical properties are studied. The tribotechnical parameters and wear mechanism of these composites are established. The wear mechanism consists in the formation of Ti[O.sub.2]-[B.sub.2][O.sub.3]-Si[O.sub.2] protective films on friction surfaces. It is shown that the amount of the metal matrix (Ni-20% Cr) influences the thickness of oxide films and, hence, the wear rate. The composite with 40% metal matrix has high wear resistance owing to the formation of a protective film with the optimal thickness (120 nm) on friction surface. Keywords: composite material, titanium diboride, silicon carbide, hot pressing, sintering, structure, wear resistance, wear mechanism, high-temperature oxidation.
ISSN:1068-1302
1573-9066