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Research on Brittle-Ductile Transition Mechanism of Single Crystal Germanium in Micro-Nano scale
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Affiliation:

Kunming University of Science and Technology,Kunming University of Science and Technology,Kunming University of Science and Technology

Clc Number:

TN304.1+1

Fund Project:

The National Natural Science Foundation of China (Grant No. 51365021)

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    Abstract:

    In order to examine the brittle-ductile transition mechanism, nano-scratch experiment was conducted on (100), (110) and (111) crystal plane by using nano-indenter, and scratch morphology was observed by using atomic force microscopy and scanning electron microscope. The critical load and critical depth of brittle-ductile transition of each crystal plane were obtained by analyzing the depth-scratch distance curve and the scratch morphology. The results showed that single crystal germanium has strong anisotropy, the critical load of brittle-ductile transition on (100), (110) and (111) crystal plane are 37.6 mN, 30.5 mN and 32.4 mN, the critical depths are 594.7 nm, 512.5 nm and 536.6 nm respectively. A most plastic remove and least brittle-ductile transition on (100) crystal plane during the process of nano-scratch is due to its minimum hardness and deepest depth of brittle-ductile transition, and with the increase of speed of scratches, critical depth and critical load of brittle-ductile transition are increased. At last, the correctness of critical load and critical depth of brittle-ductile transition was verified through constant load scratch experiments.

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[Yang Xiaojing, Zhao Biao, Luo liang. Research on Brittle-Ductile Transition Mechanism of Single Crystal Germanium in Micro-Nano scale[J]. Rare Metal Materials and Engineering,2018,47(10):3228~3232.]
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History
  • Received:January 12,2017
  • Revised:September 17,2018
  • Adopted:May 15,2017
  • Online: November 08,2018
  • Published: