| Preparation and Characterization of Amorphous W–B–C Alloy and Solid Solutions of C in Tungsten Borides |
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| 摘 要： | Mixtures of W and B_(13) C_2 powders were mechanically milled and subsequently annealed at 900–1200 °C. It is found that amorphous W–B–C alloy formed as the mixtures were milled for 20–80 h. After annealing the 80 h-milled mixtures at 900–950 °C, solid solutions of C and/or B in tungsten [W(B, C)], C in tungsten boride [W_2 B(C) or WB(C)]formed by the crystallization of amorphous W–B–C. The formation temperature of W_2 B(C) and WB(C) is lower than that of W_2 B and WB reported previously. As the 80 h-milled mixtures were annealed at 1200 °C, W reacted with amorphous W–B–C completely to form WB and W_2B_5 or W_2B_5 instead of the solid solutions of C in tungsten borides, which is determined by the mole ratio of W to B_(13) C_2. The formation mechanisms of the W_2 B(C) and WB(C) solid solutions as well as phase transition rules of the mixtures at annealing temperature and mole ratio were also investigated using first-principle calculation.
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| 收稿时间： | 2017-11-17 |
Preparation and Characterization of Amorphous W-B-C Alloy and Solid Solutions of C in Tungsten Borides |
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| Hao Sun,Suo-Zhu Bai,Dan-Dan Yao,Bin Yao,Zhan-Hui Ding,Yong-Feng Li. Preparation and Characterization of Amorphous W-B-C Alloy and Solid Solutions of C in Tungsten Borides[J]. Acta Metallurgica Sinica(English Letters), 2018, 31(4): 380. DOI: 10.1007/s40195-017-0677-1 |
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| Authors: | Hao Sun Suo-Zhu Bai Dan-Dan Yao Bin Yao Zhan-Hui Ding Yong-Feng Li |
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| Affiliation: | 1.State Key Lab of Superhard Materials and College of Physics, Jilin University, Changchun 130023, China;2. Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, China;3. Chemistry and Chemical Engineering College, Inner Mongolia University for the Nationalities, Tongliao 028000,China;4. Liaoning Academy of Safety Science, Shenyang 110004,China |
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| Abstract: | Mixtures of W and B13C2 powders were mechanically milled and subsequently annealed at 900-1200 °C. It is found that amorphous W-B-C alloy formed as the mixtures were milled for 20-80 h. After annealing the 80 h-milled mixtures at 900-950 °C, solid solutions of C and/or B in tungsten [W(B, C)], C in tungsten boride [W2B(C) or WB(C)] formed by the crystallization of amorphous W-B-C. The formation temperature of W2B(C) and WB(C) is lower than that of W2B and WB reported previously. As the 80 h-milled mixtures were annealed at 1200 °C, W reacted with amorphous W-B-C completely to form WB and W2B5 or W2B5 instead of the solid solutions of C in tungsten borides, which is determined by the mole ratio of W to B13C2. The formation mechanisms of the W2B(C) and WB(C) solid solutions as well as phase transition rules of the mixtures at annealing temperature and mole ratio were also investigated using first-principle calculation. |
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| Keywords: | Ball milling Annealing Tungsten borides Amorphous alloy |
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