EFFECT OF FIBER SURFACE-MORPHOLOGY ON STABILITY OF C TIBX COATINGS INTI-6AL-4V/SIGMA (SM1240) FIBER METAL-MATRIX COMPOSITE/

Authors
UPADHYAYA D TSAKIROPOULOS P WARDCLOSE CM FROES FH
Citation
D. Upadhyaya et al., EFFECT OF FIBER SURFACE-MORPHOLOGY ON STABILITY OF C TIBX COATINGS INTI-6AL-4V/SIGMA (SM1240) FIBER METAL-MATRIX COMPOSITE/, Materials science and technology, 10(10), 1994, pp. 887-893
Citations number
23
Categorie Soggetti
Metallurgy & Metallurigical Engineering","Material Science
Journal title
Materials science and technology → ACNP
ISSN journal
02670836
Volume
10
Issue
10
Year of publication
1994
Pages
887 - 893
Database
ISI
SICI code
0267-0836(1994)10:10<887:EOFSOS>2.0.ZU;2-L
Abstract
Sigma fibres (SM1240) produced by a chemical vapour deposition process using a 15 mum tungsten wire core for SiC deposition have a duplex co ating of graphitic carbon and TiB(x). Nodules present on the fibre sur face are attributed to the deposition of the carbon coating over soot particles present on the substrate. Both the carbon and TiB(x) coating s were stable in vacuum or air at temperatures up to 973 K. The nodule s were found to be sites of preferential attack by the titanium alloy matrix. The average number of nodules per fibre decreased more rapidly when the specimens were heated in air than in vacuum. It is suggested that the nodules may reduce the stability temperature of the coatings .