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Effect of low diffusion coefficient on glass phase formation in Pd77Cu6Si17 alloy

Wang Zhen-Zhong Wang Nan Yao Wen-Jing

Effect of low diffusion coefficient on glass phase formation in Pd77Cu6Si17 alloy

Wang Zhen-Zhong, Wang Nan, Yao Wen-Jing
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  • Received Date:  08 December 2009
  • Accepted Date:  15 December 2009
  • Published Online:  15 October 2010

Effect of low diffusion coefficient on glass phase formation in Pd77Cu6Si17 alloy

  • 1. Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China

Abstract: The microstructure evolution of laser rapidly solidified Pd77Cu6Si17 alloy was investigated. The experimental results showed that with increasing growth velocity, a phase transition series of Pd3Si dendrite+eutectic-ξ dendrite+eutectic-eutectic grain-regular eutectic-amorphous phase occurred. The critical velocity of amorphous transition was determined to be about 6 mm/s and the smallest lamellar spacing was 35 nm. Compared with those of Al-25 wt% Sm and Al-32.7 wt% Cu alloys, it was proposed that low diffusion coefficient is the main reason for the good glass formation ability of Pd77Cu6Si17 alloy.

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