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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 1    February 2002

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Ignition time of self-propagating 
high-temperature synthesis by laser
CHEN Sen-chang(陈森昌)1, CHI Yan-hui(迟彦惠)2
SHI Yu-sheng(史玉升)1, HUANG Shu-huai(黄树槐)1

1.College of Materials Science and Engineering,
Huazhong University of Science and Technology,Wuhan 430074,China;
2.Department of Basic Courses,Hubei Auto Industry Institute, 
Shiyan 442002,China

Abstract:The ignition of self-propagating high-temperature synthesis (SHS) by a laser beam has very well application, but there is lack in study on the ignition process. In order to search the rule of ignition process with laser beam, ignition time of SHS was studied in detail. First one dimension ignition model was introduced: burning is the process in which one layer is ignited by next layer. Then according to Fourier conduction equation, an equation used to calculate the ignition time was deduced. Finally a series of tests were made to verify the equation. The results prove that the change of the parameters in test agrees well with the equation.

 

Key words: SHS; laser; ignition model; ignition time

ISSN 1672-7029
CN 43-1423/U

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