By a News Reporter-Staff News Editor at Journal of Technology -- Investigators discuss new findings in Raman Spectroscopy. According to news reporting out of Xi'an, People's Republic of China, by VerticalNews editors, research stated, "SiC fiber-reinforced metal matrix composite is an interesting material for aerospace industry because of its excellent properties. However, these properties are greatly influenced by fiber microstructure and thermal residual stresses introduced by the preparation of the composites."
Our news journalists obtained a quote from the research from Northwestern Polytechnic University, "Due to complicated preparation technology, microstructure and thermal stress along SiC fiber radius varies, which makes characterization difficult. Raman spectroscopy is a non-destructive technique which provides information, at micrometer scale, on the phase composition and the crystalline state (structure and texture) of materials. Line scanning was used to assess microstructure along SiC fiber radius embedded in Ti64. The SiC coating is subdivided into three concentric parts across the fiber diameter, according to the differences in intensity and width of SiC transverse optical phonon (TO) band. Part 2 is considered to be a buffer zone connecting Part 1 and Part 3 with different deposition conditions, respectively. Amorphous Si is detected throughout fiber radius, while crystalline Si is only detected in the outer part. Thermal residual stress along fiber radius in the composite was calculated by using SiC TO band shifts with a bare fiber as reference."
According to the news editors, the research concluded: "A cylindrical model was also used to compare with the stress data obtained from Raman shift."
For more information on this research see: Microstructure and thermal residual stress analysis of SiC fiber through Raman spectroscopy. Journal of Raman Spectroscopy, 2013;44(9):1306-1311. Journal of Raman Spectroscopy can be contacted at: Wiley-Blackwell, 111 River St, Hoboken 07030-5774, NJ, USA. (Wiley-Blackwell - www.wiley.com/; Journal of Raman Spectroscopy - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1097-4555)
Our news journalists report that additional information may be obtained by contacting Z.Y. Xiao, Northwestern Polytechnic Univ, State Key Lab Solidificat Proc, Xian 710072, People's Republic of China. Additional authors for this research include Y.Q. Yang, N. Jin, S. Liu, X. Luo and B. Huang.
Keywords for this news article include: Asia, Xi'an, Raman Spectroscopy, People's Republic of China
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC