Solubility of carbon in liquid silicon equilibrated with silicon carbide

K. Yanaba; M. Akasaka; M. Takeuchi; M. Watanabe; T. Narushima; Y. Iguchi

doi:10.2320/matertrans1989.38.990

Solubility of carbon in liquid silicon equilibrated with silicon carbide

K. Yanaba, M. Akasaka, M. Takeuchi, M. Watanabe, T. Narushima, Y. Iguchi

ENG - Materials Processing

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

The solubility of carbon in liquid silicon equilibrated with silicon carbide was determined in the temperature range from 1723 to 1873 K. Silicon was melted in a silicon carbide crucible with an Ar-CO mixture gas flowing. Carbon in silicon was analyzed by the combustion-IR absorption method. The temperature dependence of the carbon solubility in liquid silicon can be represented by the following equation: log(C_{c + (Combining lew line)}/mass%)=3.63-9660/T(±0.02) (T: 1723-1873 K) The carbon solubility at the melting point of silicon was calculated to be 79 ppm (9.1 × 10¹⁸ atoms·cm^-3). The level of oxygen impurities in the melt was much lower than that of liquid silicon equilibrated with solid silica. The standard Gibbs free energy change for carbon dissolution in liquid silicon can be represented as: C(s)=C + (Combining lew line)(1 mass%, in liquid silicon) ΔG°=7.20 × 10⁴-11.4Tlog T+6.20T (J).

Original language	English
Pages (from-to)	990-994
Number of pages	5
Journal	materials transactions, jim
Volume	38
Issue number	11
DOIs	https://doi.org/10.2320/matertrans1989.38.990
Publication status	Published - 1997 Nov

Keywords

Carbon
Equilibrium
Silicon
Silicon carbide
Silicon melt
Solubility
Thermodynamics

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title = "Solubility of carbon in liquid silicon equilibrated with silicon carbide",

abstract = "The solubility of carbon in liquid silicon equilibrated with silicon carbide was determined in the temperature range from 1723 to 1873 K. Silicon was melted in a silicon carbide crucible with an Ar-CO mixture gas flowing. Carbon in silicon was analyzed by the combustion-IR absorption method. The temperature dependence of the carbon solubility in liquid silicon can be represented by the following equation: log(Cc + (Combining lew line)/mass%)=3.63-9660/T(±0.02) (T: 1723-1873 K) The carbon solubility at the melting point of silicon was calculated to be 79 ppm (9.1 × 1018 atoms·cm-3). The level of oxygen impurities in the melt was much lower than that of liquid silicon equilibrated with solid silica. The standard Gibbs free energy change for carbon dissolution in liquid silicon can be represented as: C(s)=C + (Combining lew line)(1 mass%, in liquid silicon) ΔG°=7.20 × 104-11.4Tlog T+6.20T (J).",

keywords = "Carbon, Equilibrium, Silicon, Silicon carbide, Silicon melt, Solubility, Thermodynamics",

author = "K. Yanaba and M. Akasaka and M. Takeuchi and M. Watanabe and T. Narushima and Y. Iguchi",

year = "1997",

month = nov,

doi = "10.2320/matertrans1989.38.990",

language = "English",

volume = "38",

pages = "990--994",

journal = "materials transactions, jim",

issn = "0916-1821",

publisher = "Japan Institute of Metals (JIM)",

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T1 - Solubility of carbon in liquid silicon equilibrated with silicon carbide

AU - Yanaba, K.

AU - Akasaka, M.

AU - Takeuchi, M.

AU - Watanabe, M.

AU - Narushima, T.

AU - Iguchi, Y.

PY - 1997/11

Y1 - 1997/11

N2 - The solubility of carbon in liquid silicon equilibrated with silicon carbide was determined in the temperature range from 1723 to 1873 K. Silicon was melted in a silicon carbide crucible with an Ar-CO mixture gas flowing. Carbon in silicon was analyzed by the combustion-IR absorption method. The temperature dependence of the carbon solubility in liquid silicon can be represented by the following equation: log(Cc + (Combining lew line)/mass%)=3.63-9660/T(±0.02) (T: 1723-1873 K) The carbon solubility at the melting point of silicon was calculated to be 79 ppm (9.1 × 1018 atoms·cm-3). The level of oxygen impurities in the melt was much lower than that of liquid silicon equilibrated with solid silica. The standard Gibbs free energy change for carbon dissolution in liquid silicon can be represented as: C(s)=C + (Combining lew line)(1 mass%, in liquid silicon) ΔG°=7.20 × 104-11.4Tlog T+6.20T (J).

AB - The solubility of carbon in liquid silicon equilibrated with silicon carbide was determined in the temperature range from 1723 to 1873 K. Silicon was melted in a silicon carbide crucible with an Ar-CO mixture gas flowing. Carbon in silicon was analyzed by the combustion-IR absorption method. The temperature dependence of the carbon solubility in liquid silicon can be represented by the following equation: log(Cc + (Combining lew line)/mass%)=3.63-9660/T(±0.02) (T: 1723-1873 K) The carbon solubility at the melting point of silicon was calculated to be 79 ppm (9.1 × 1018 atoms·cm-3). The level of oxygen impurities in the melt was much lower than that of liquid silicon equilibrated with solid silica. The standard Gibbs free energy change for carbon dissolution in liquid silicon can be represented as: C(s)=C + (Combining lew line)(1 mass%, in liquid silicon) ΔG°=7.20 × 104-11.4Tlog T+6.20T (J).

KW - Carbon

KW - Equilibrium

KW - Silicon

KW - Silicon carbide

KW - Silicon melt

KW - Solubility

KW - Thermodynamics

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Solubility of carbon in liquid silicon equilibrated with silicon carbide

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