The re-entrant surface order-disorder transition on the BCC(110) surface |
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| Affiliation: | 1. Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China;2. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China;3. Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China;4. Center for Advanced Nuclear Safety and Sustainable Development, City University of Hong Kong, Hong Kong, China;1. Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China;2. Hong Kong Institute for Advanced Study, City University of Hong Kong, Hong Kong, China;3. School of Aerospace Engineering, Xiamen University, Xiamen 361005, China;4. College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China;5. Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China;6. School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai 200093, China;7. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong, China;8. The State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. Faculty of Engineering and Information Technology, Monash University, Melbourne, VIC, Australia;1. School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China;2. State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China;3. Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Miyagi, Japan;4. College of Metallurgy Engineering, Xi''an University of Architecture and Technology, Xi''an 710055, China;5. School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia |
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| Abstract: | The surface order-disorder transition has been studied for the BCC(110) surface of a binary alloy by use of the Bragg-Williams approximation. In the case with a large surface segregation energy, we have found a re-entrant surface order-disorder transition above the transition temperature of the bulk crystal. The origin of this transition can be understood by considering the variation of the surface concentration with temperature. |
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