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High‐Temperature Strength and Creep Behavior of Melt‐Infiltrated SiC‐Mo ≤5 Si 3 C ≤1 Composites
Author(s) -
Zhu Qingshan,
Shobu Kazuhisa,
Tani Eiji,
Kishi Kazushi,
Umebayashi Seiki
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb02079.x
Subject(s) - materials science , composite material , creep , brittleness , intermetallic , atmospheric temperature range , molybdenum , compressive strength , flexural strength , metallurgy , physics , alloy , meteorology
Molybdenum carbosilicide composites (SiC‐Mo ≤5 Si 3 C ≤1 ) were fabricated via the melt‐infiltration process. The fracture behavior of the composites was studied from room temperature up to 1800°C in 1 atm (∼10 5 Pa) of argon. The bend strength of the composites slightly increased at ∼1200°C, because of the brittle‐ductile transition of the intermetallic phase. The composites retained ∼90% of their room‐temperature strength, even at 1700°C. Compressive creep tests were performed over a temperature range of 1760°‐1850°C and a stress range of 200–250 MPa. The creep rate of the SiC‐Mo ≤5 Si 3 C ≤1 composites was approximately an order of magnitude higher than that of reaction‐bonded SiC.