title: Synthesis of SiC nanowires with in-situ deposition of carbon coating.
abstract: SiC nanowires are effective reinforcement materials in ceramic matrix composites. A compliant coating such as carbon on nanowires is necessary in order to moderate the nanowire/matrix interfacial bounding for taking the most advantages of SiC nanowires. SiC nanowires with an in-situ deposition of carbon shell coating were fabricated by a novel chemical vapor growth process. Highresolution transmission electron microscopy examinations showed that the nanowires consisted of a single crystal beta-SiC core with an amorphous carbon shell 2-5 nm in thickness. The nanowires were straight with a length generally over 10 microm and a diameter 15-150 nm. The growth direction of the core SiC nanowires is (111). A simple three-step growth model for SiC nanowires was proposed based on a vapor-solid growth mechanism. Because the carbon-coated nanowires were grown directly on continuous Tyranno-SA SiC fibers, in-situ application of the present technique on the fabrication of SiC nanowire-reinforced SiC/SiC composites is expected.
authors.affiliation: National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan.
authors.forename: Wen
authors.initials: W
authors.lastname: Yang
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Araki
authors.forename: Chengchun
authors.initials: C
authors.lastname: Tang
authors.forename: Quanli
authors.initials: Q
authors.lastname: Hu
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Suzuki
authors.forename: Tetsuji
authors.initials: T
authors.lastname: Noda
mesh_terms: D002244:Carbon / Q000737:chemistry*; D004559:Electric Wiring; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods*; D012825:Silicon / Q000737:chemistry*
chemical_list: D002244:Carbon; D012825:Silicon