Premium
Dense Layered Molybdenum Disilicide–Silicon Carbide Functionally Graded Composites Formed by Field‐Activated Synthesis
Author(s) -
CarrilloHeian Ellen M.,
Carpenter R. Douglas,
Paulino Glaucio H.,
Gibeling Jeffery C.,
Munir Zuhair A.
Publication year - 2001
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.1151-2916.2001.tb00775.x
Subject(s) - molybdenum disilicide , materials science , electron microprobe , stoichiometry , silicon carbide , molybdenum , ternary operation , carbide , composite material , silicon , phase (matter) , field electron emission , intermetallic , layer (electronics) , metallurgy , electron , chemistry , physics , alloy , quantum mechanics , organic chemistry , computer science , programming language
Dense, layered, single‐ and graded‐composition composites of MoSi 2 and SiC were formed from elemental powders in one step, using the field‐activated pressure‐assisted combustion method. Compositions ranging from 100% MoSi 2 to 100% SiC were synthesized, with relative densities ranging from 99% to 76%, respectively. X‐ray diffractometry results indicated the formation of pure phases when the concentration of MoSi 2 was high and the appearance of a ternary phase, Mo 4.8 Si 3 C 0.6 , when the concentration of SiC was high. Electron microprobe analysis results showed the formation of stoichiometric and uniformly distributed phases. A layer‐to‐layer variation in composition of 10 mol% was sufficient to prevent thermal cracking during formation of the layered functionally graded materials.