|Interfacial reaction and nanostructures in Mg matrix composites reinforced with carbon fibers modified by sol-gel method|
|W. G. Wang; B. L. Xiao; Z. Y. Ma
|Source Publication||Composites Science and Technology
|Abstract||Continuous carbon fibers (C-f) were modified with gamma-Al2O3 and anatase-TiO2 coatings in sol-gel route, and used to prepare 45 vol.% C-f reinforced Mg matrix composites (referred to as Al2O3-C-f and TiO2-C-f composites) using a vacuum pressureless infiltration process, producing the tensile strengths of 550 MPa and 980 MPa, respectively. During the composite fabrication, the Mg matrix reacted with the coatings to form the interfacial layers composed primarily of MgO nanoparticles, with a size of about 10-20 nm and 3-5 nm, respectively, for the Al2O3-C-f and TiO2-C-f composites. Such interfacial reaction produced a volume expansion in the interfacial layer, resulting in the formation of a great deal of crystal defects, such as distorted lattice, dislocation and amorphous intergranular phase. The Al2O3-C-f composite exhibited lower tensile strength due to greater volume expansion in the interfacial layer. A few TiC and TiO2 nanoparticles were observed in the interfacial layer of the TiO2-C-f composite. This is attributed to the restraining effect of the reduced Ti accumulated in the near-interface matrix on the atom diffusion (Mg and Ti), remaining some TiO2 nanoparticles at the surface of C-f. This showed a new self-regulating mechanism of interfacial reaction. (C) 2013 Elsevier Ltd. All rights reserved.|
|description.department||[wang, w. g.
; xiao, b. l.
; ma, z. y.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [wang, w. g.] liaoning shihua univ, fushun 113001, peoples r china.
; ma, zy (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china.
|Keyword||Metal Matrix Composites (Mmcs)
Carbon Fibers (C-f)
W. G. Wang,B. L. Xiao,Z. Y. Ma. Interfacial reaction and nanostructures in Mg matrix composites reinforced with carbon fibers modified by sol-gel method[J]. Composites Science and Technology,2013,87:69-76.
W. G. Wang,B. L. Xiao,&Z. Y. Ma.(2013).Interfacial reaction and nanostructures in Mg matrix composites reinforced with carbon fibers modified by sol-gel method.Composites Science and Technology,87,69-76.
W. G. Wang,et al."Interfacial reaction and nanostructures in Mg matrix composites reinforced with carbon fibers modified by sol-gel method".Composites Science and Technology 87(2013):69-76.
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