SHS법을 이용한 복합분말(Al 2 O 3 -SiC) 제조시 TiO 2 첨가의 영향

윤기석; 양범석; 이종현; 원창환; K.S. Yun; B.S. Yang; J-H Lee; C.W. Won

Korean Journal of Materials Research, Vol.12, No.1, 48-53, January, 2002

DOI10.3740/MRSK.2002.12.1.048 Export Citation

SHS법을 이용한 복합분말(Al 2 O 3 -SiC) 제조시 TiO 2 첨가의 영향

The effect of the addition of TiO 2 in the preparation of (Al 2 O 3 -SiC)- SiC composite powder by SHS Process

윤기석, 양범석, 이종현, 원창환^†

충남대학교 급속옹고센터

K.S. Yun, B.S. Yang, J-H Lee, and C.W. Won^†

Rapidly Solidifed Materials Research Center, Chungnam National University, Taejeon, 305-764, Korea

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Al 2 O 3 ?SiC and Al 2 O 3 ?SiC -TiC composite powders were prepared by SHS process using SiO 2 ,TiO 2 , Al and C as raw materials. Aluminum powder was used as reducing agent of SiO 2 ,TiO 2 and activated charcoal was used as carbon source. In the preparations of Al 2 O 3 ?SiC , the effect of the molar ratio in raw materials, compaction pressure, preheating temperature and atmosphere were investigated. The most important variable affecting the synthesis of Al 2 O 3 ?SiC was the molar ratio of carbon. Unreactants remained in the product among all conditions without compaction. The optimum condition in this reaction was SiO 2 : Al: C=3: 5: 5.5, 80MPa compaction pressure under Preheating of 400 ? C with Ar atmosphere. However there remains cabon in the optimum condition. The effect of TiO 2 as additive was investigated in the preparations of Al 2 O 3 ?SiC . As a result of TiO 2 addition, Al 2 O 3 ?SiC -TiC composite powder was prepared. The Al 2 O 3 powder showed an angular type with 8 to 15μm , and the particle size of SiC powder were 5~ 10μm and TiC powder were 2 to 5μm .

Keywords:SHS process;(Al 2 O 3 ?SiC) - SiC;(Al 2 O 3 ?SiC) - SiC- TiC;molar ratio;compaction pressure;preheating temperature;additive

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[2] Cider JF, Ceramic Eng. Sci. Proc., 3, 519 (1982)

[3] Ouabdesselam M, Munir ZA, J. Met. Sci., 22, 1799 (1987)

[4] Hardt AP, Phung PV, Combust. Flame, 21, 77 (1973)

[5] Hardt AP, Holsinger RW, ibid., 21, 91 (1973)

[6] Merzhanov AG, Borovinskaya IP, Dokl. Akad. Nauk. SSSR, 204, 429 (1972)

[7] Munir ZA, 'Synthesis of High Temperature Materials by Self- propagating Combustion Methods', Ceramic Bulletin, V.67 (2),342 (1988) (1988)

[8] Schwartz MM: Handbook of Structural Ceramics, Sikorsky Aircraft Division United Technologies Corporation, 8.13-8.17 (1992) (1992)

[9] Powder metallurgy, dang H, Inst. kor : J. Kor. Inst. Met. & Mater., 166-167 (1987) (1987)

[10] Holt JB, Munir ZA, J. Mater. Sci., 21, 251 (1986)

[11] Lee WC, Chung SL, J. Mater. Sci., 30(6), 1487 (1995)

[12] Shkiro VM, Borovinskaya LP, Comb. Proc. in Chem. Eng. Met., 253 (1975)

[13] Borovinskaya IP, Fizika Goreniya I Vzryva, 10(1), 415 (1974)

[14] Shkiro VM, Borovinskaya LP, Nersisyan GA, Fizika Goreniya I Vzryva, 14(4), 58 (1978)

[15] Jo SW, Lee GW, Moon AT, Kim YS, J. Kor. Inst. Met. Mater., 33(1), 107 (1995)

[16] Mukasyan AS, Borovinskaya LP, International J. of SHS, 1(1), 55 (1992)

[17] Ko SK, Preparation and Sintering of Alumina-Titanium Carbide Composite Powder by Self-Propagating High Temperatiure Synthesis, 7, Chungnarn National University (1998) (1998)

[18] Feng HJ, Moore JJ, Wirth EG, Metall. Trans. A, 23A(9), 2373 (1992)

[19] Lee HB, Cho DH, Jang JW, J. Kor. Ceram. Soc., 29(7), 577 (1992)

[20] Logan KV: 28 in combustion and Plasma Synthesis of High Temperature Materials, Edited by Munir ZA, Holt JB VCH Publishers, New York, 219 (1990) (1990)

[21] Joo SM, Ko SK, Lee JH, Won CW, J. Kor. Ins. Met. Mat., 33(9), 1154 (1995)

[22] Lee HM, Lee HL, J. Kor. Ceram. Soc., 32, 11 (1995)

[23] Ahn CY, Characteristics of Al,03-SiC Powder Prepared by Self-propagating High Temperature Synthesis Process and its Sintering Behavior, 20. Chung man National University (1999) (1999)