Study Results from National University of Defense Technology Provide New Insights into Coatings Technology

By a News Reporter-Staff News Editor at Journal of Technology -- New research on Coatings Technology is the subject of a report. According to news reporting originating in Changsha, People's Republic of China, by VerticalNews journalists, research stated, "In order to improve the anti-oxidation performance of carbon fiber reinforced silicon carbide (C/SiC) composites, SiC coating was prepared by chemical vapor deposition (CVD). The effects of high-temperature annealing and the anti-oxidation properties of coated composites were investigated."

The news reporters obtained a quote from the research from the National University of Defense Technology, "The results showed that CVD-SiC coating, which was p-sic phase, was fabricated successfully on the PIP-C/SiC with thickness of about 30 mu m. It was clear that visible cracks existed and the ratio of weight loss increased with the annealing temperature increasing, while the flexural strength of coated composites greatly decreased with the elevation of the annealing temperature. Coated composites showed the best anti-oxidation ability at 1773 K (1.73 wt.%). During thermal cycle tests, the weight loss of coated sample was 0.68 wt.% and the percentage of remaining strength was 981%."

According to the news reporters, the research concluded: "The decrease of flexural strength during the tests was primarily due to the oxidation of the coated samples by oxygen or vapor."

For more information on this research see: Microstructures and mechanical properties of CVD-SiC coated PIP-C/SiC composites under high temperature. Surface & Coatings Technology, 2012;209():197-202. Surface & Coatings Technology can be contacted at: Elsevier Science Sa, PO Box 564, 1001 Lausanne, Switzerland. (Elsevier - www.elsevier.com; Surface & Coatings Technology - www.elsevier.com/wps/product/cws_home/504101)

Our news correspondents report that additional information may be obtained by contacting Y. Xiang, Natl Univ Def Technol, Sci & Technol Adv Ceram Fibers & Composites Lab, Changsha 410073, Hunan, People's Republic of China.

Keywords for this news article include: Asia, Changsha, Coatings Technology, People's Republic of China

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