원료분말에 따른 Al 2 O 3 /CuO 분말혼합체의 수소환원 거동 및 미세조직 특성

오승탁; 김정남; 강계명; Sung-Tag Oh; Jung-Nam Kim; Kae-Myung Kang

Korean Journal of Materials Research, Vol.14, No.10, 696-700, October, 2004

DOI10.3740/MRSK.2004.14.10.696 Export Citation

원료분말에 따른 Al 2 O 3 /CuO 분말혼합체의 수소환원 거동 및 미세조직 특성

Hydrogen Reduction Behavior of Al 2 O 3 /CuO Powder Mixtures Prepared from Different Raw Powders and Their Microstructural Characteristics

오승탁 ^†, 김정남, 강계명

서울산업대학교 신소재공학과

Sung-Tag Oh^†, Jung-Nam Kim, and Kae-Myung Kang

Department of Materials Science and Engineering, Seoul National University of Technology, Seoul, 139-743, Korea

E-mail:

The reduction behavior of Al 2 O 3 /CuO powder mixtures, prepared from Al 2 O 3 /CuO or Al 2 O 3 /Cu?nitrate , was investigated by using thermogravimetry and hygrometry. The powder characteristics were examined by BET, XRD and TEM. Also, the influence of powder characteristics on the microstructure and properties of hot-pressed composites was analyzed. The formation mechanism of nano-sized Cu dispersions was explained based on the powder characteristics and reduction kinetics of oxide powders. In addition, the dependence of the microstructure and mechanical properties of hot-pressed composites on powder characteristics is discussed in terms of the initial size and distribution of Cu particles. The practical implication of these results is that an optimum processing condition for the design of homogeneous microstructure and required properties can be established.

Keywords:hydrogen reduction;microstructure;nanocomposites

[References]

Niihara K, J. Ceram. Soc. Jpn., 99, 974 (1991)
Sekino T, Niihara K, J. Mater. Sci., 32(15), 3943 (1997)
Sekino T, Niihara K, Nanostruct. Mater., 6, 663 (1995)
Sekino T, Nakajima T, Ueda S, Niihara K, J. Am. Ceram. Soc., 80, 1139 (1997)
Oh ST, Sando M, Niihara K, J. Am. Ceram. Soc., 81, 3013 (1998)
Oh ST, Sekino T, Niihara K, Nanostruct. Mater., 10, 327 (1998)
Oh ST, Lee JS, Sekino T, Niihara K, Scripta Mater., 44(8-9), 2117 (2001)
Niihara K, Morena R, Hasselman DPH, J. Mater. Sci. Lett., 1, 13 (1982)
Gmelins Handbuch der Anorganischen Chemie-Cu. 8, 8. Aufl., System-Nummer 60, p. 84, Verlag Chemie GmbH, Weinheim, Germany, (1958) (1958)
Kim DG, Oh ST, Jeon H, Lee CH, Kim YD, J. Alloys and Comp., 354, 239 (2003)
Smith CS, rans. Metall. Soc. AIME, 175, 15 (1948)
Kingery WD, Bowen HK, Uhlmann D, Introduction to Ceramics, 2nd Ed., p. 765, John Wiley and Sons, New York, USA, (1976) (1976)

[Referenced By]

[Related Articles]

[1] Niihara K, J. Ceram. Soc. Jpn., 99, 974 (1991)

[2] Sekino T, Niihara K, J. Mater. Sci., 32(15), 3943 (1997)

[3] Sekino T, Niihara K, Nanostruct. Mater., 6, 663 (1995)

[4] Sekino T, Nakajima T, Ueda S, Niihara K, J. Am. Ceram. Soc., 80, 1139 (1997)

[5] Oh ST, Sando M, Niihara K, J. Am. Ceram. Soc., 81, 3013 (1998)

[6] Oh ST, Sekino T, Niihara K, Nanostruct. Mater., 10, 327 (1998)

[7] Oh ST, Lee JS, Sekino T, Niihara K, Scripta Mater., 44(8-9), 2117 (2001)

[8] Niihara K, Morena R, Hasselman DPH, J. Mater. Sci. Lett., 1, 13 (1982)

[9] Gmelins Handbuch der Anorganischen Chemie-Cu. 8, 8. Aufl., System-Nummer 60, p. 84, Verlag Chemie GmbH, Weinheim, Germany, (1958) (1958)

[10] Kim DG, Oh ST, Jeon H, Lee CH, Kim YD, J. Alloys and Comp., 354, 239 (2003)

[11] Smith CS, rans. Metall. Soc. AIME, 175, 15 (1948)

[12] Kingery WD, Bowen HK, Uhlmann D, Introduction to Ceramics, 2nd Ed., p. 765, John Wiley and Sons, New York, USA, (1976) (1976)