Composite material consisting of fibers or particles in a metallic matrix
In materials science, a metal matrix composite (MMC) is a composite material with fibers or particles dispersed in a metallic matrix, such as copper, aluminum, or steel. The secondary phase is typically a ceramic (such as alumina or silicon carbide) or another metal (such as steel[1]). They are typically classified according to the type of reinforcement: short discontinuous fibers (whiskers), continuous fibers, or particulates. There is some overlap between MMCs and cermets, with the latter typically consisting of less than 20% metal by volume. When at least three materials are present, it is called a hybrid composite. MMCs can have much higher strength-to-weight ratios,[2] stiffness, and ductility than traditional materials, so they are often used in demanding applications. MMCs typically have lower thermal and electrical conductivity and poor resistance to radiation[citation needed], limiting their use in the very harshest environments.
^Gopi Krishna, M.; Praveen Kumar, K.; Naga Swapna, M.; Babu Rao, J.; Bhargava, N.R.M.R. (2018). "Metal-metal Composites-An Innovative Way For Multiple Strengthening". Materials Today: Proceedings. 4 (8): 8085–8095. doi:10.1016/j.matpr.2017.07.148. ISSN 2214-7853.
^Dieter, George E. (1986). Mechanical metallurgy (3rd ed.). New York: McGraw-Hill. pp. 220–226. ISBN 0-07-016893-8. OCLC 12418968.
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