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Phase diagram study of the Si-P system in Si-rich region

机译：富硅地区Si-P体系的相图研究

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摘要

The Si-P system at high temperatures up to 6 wt%P was investigated. Silicon-phosphorus alloys were prepared through the melting of silicon-phosphorus mixtures in closed silica tubes. Microstructural studies indicated two phases in the alloys, i.e., a solid solution of P in Si and the intermediate compound SiP. Thermal analysis technique was applied to study the phase transformations in the alloys at elevated temperatures. It was observed that SiP is melted at 1139 ± 2 ℃. A eutectic reaction in the system, in which liquid Si-P alloy is transformed to SiP and a solid solution of P in Si was observed at 1129 ± 2 ℃. Moreover, the liquidus and solidus on the silicon-rich part of the phase diagram were determined as: Solidus: T_S = -75.03 C_P + 1414 (℃) 0.35 < C_P < 1 wt%P Liquidus: T_L = -6.74 C_P + 1414 (℃) C_P < 6 wt%P The distribution coefficient of P in Si was calculated as k_0 = 0.09 using the obtained solidus and liquidus at low concentrations.
机译：研究了高达6 wt％P的高温下的Si-P系统。硅磷合金是通过在封闭的石英管中熔融硅磷混合物而制得的。显微组织研究表明合金中有两个相，即P在Si和中间化合物SiP中的固溶体。应用热分析技术研究了高温下合金的相变。观察到SiP在1139±2℃熔化。在1129±2℃观察到体系中的共晶反应，其中液态Si-P合金转化为SiP，且P在Si中固溶。此外，相图的富硅部分上的液相线和固相线确定为：固相线：T_S = -75.03 C_P + 1414（℃）0.35

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  • 来源
    《Journal of Materials Research》 |2011年第12期|p.1494-1503|共10页
  • 作者

    Jafar Safarian; Merete Tangstad;

  • 作者单位

    Norwegian University of Science and Technology, 7491 Trondheim, Norway;

    Norwegian University of Science and Technology, 7491 Trondheim, Norway;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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