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Citation: Teng Xin-Ying, Ye Yi-Fu, Shi Zhi-Qiang, Wang Huan-Rong, Qin Jing-Yu. Correlation between Liquid and Solid Structure of Fe₆₈Si₃₂ Alloy[J]. Acta Physico-Chimica Sinica, ;2002, 18(04): 336-339. doi: 10.3866/PKU.WHXB20020410 shu

Correlation between Liquid and Solid Structure of Fe₆₈Si₃₂ Alloy

1.
Key Laboratory of Liquid Structure and Heredity of Materials,Ministry of Education, Shandong University,Jinan　250061;College of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai　200237

Received Date: 20 August 2001
Available Online: 15 April 2002

Using hightemperature θθ Xray diffractometer,the liquid structure of Fe68Si32 alloy was investigated and the structure factor, radial distribution function, the nearest neighbor distance and coordination number were obtained. In the temperature range of 1250～1450 ℃ the nearest neighbor distance and coordination number of the alloy are 0.259～0.260 nm and 10.3(±0.2), respectively. A visible prepeak atQ=15.5 nm－1 in the structure factor S(Q) of liquid Fe68Si32 alloy is observed. According to the characters of prepeak, an atom model of liquid Fe68Si32 alloy was constructed, namely, ordered bcc Fe3Si clusters form a Fe3Si fcc superstructure unit(DO3) with a shared face. The results of Gaussian separation of RDF for Fe68Si32 alloy at 1250 ℃ agrees well with that of Fe3Si superstructure. The prepeak is related to the correlation between silicon atoms in the superstructure. The Xray diffraction of solid Fe68Si32 alloy showed the existence of Fe3Si phase in the alloy and the peaks agree with that of S(Q), which means the correlation of structure between liquid and solid Fe68Si32 alloy.
- Liquid and solid Fe₆₈Si₃₂ alloy;Structure factor;Pre-peak;X-ray diffraction
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Correlation between Liquid and Solid Structure of Fe68Si32 Alloy

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通讯作者: 陈斌, bchen63@163.com

Correlation between Liquid and Solid Structure of Fe₆₈Si₃₂ Alloy