Alumina/Aluminum Composite Fabricated by Freeze and Dry Process with Water-Soluble Polymer Slurry

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To clarify the effects of parameters of porous ceramics form on the characteristics of composites fabricated by high-pressure infiltration, Alumina forms with different porosity (15~70vol %) and pore morphology were fabricated by Freeze and Dry Process and Partial Sintering Process. Alumina/aluminum composites were made by the squeeze casting. The composites contained the different volume fraction of aluminum depending on the initial porosity of the ceramics form. The coefficient of thermal expansion (CTE) and thermal conductivity of composites were measured. The results indicated clearly that variation of the structure of porous ceramics form fairly affected CTE but the effects on thermal conductivity were small.

Info:

Periodical:

Materials Science Forum (Volumes 486-487)

Edited by:

Hyung Sun Kim, Sang-Yeop Park, Bo Young Hur and Soo Wohn Lee

Pages:

329-332

Citation:

M. Nakata and K. Suganuma, "Alumina/Aluminum Composite Fabricated by Freeze and Dry Process with Water-Soluble Polymer Slurry", Materials Science Forum, Vols. 486-487, pp. 329-332, 2005

Online since:

June 2005

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$38.00

[1] Patent No. 3124274, Japan.

[2] T. Fukusawa and M. Ando: J. Am. Soc. 84 [1]230-32(2001).

[3] T. Fukusawa Z. Y. Deng and M. Ando: Journal of material science 36(2001)2523-2527.

[30] [0] [5] [10] [15] [20] [25] [0] 0. 2 0. 4 0. 6 0. 8 1 Al Content (vol) Fig 2. Coefficient of thermal expansion of Al2O3/Al composites as a function of Al content (50~400 ºC ) Coefficient of Thermal Expansion (10-6/K) Freeze and dry process. Partial sintering process. Al2O3 Al Freeze and dry process. Partial sintering process. Al2O3 Al Al Content (Vol).

DOI: https://doi.org/10.4028/www.scientific.net/msf.426-432.2279

[50] 100 150 200 250 300.

0. 2 0. 4 0. 6 0. 8 1 Fig 3. Theoretical analysis of thermal conductivity of Al2O3/Al composites. (46 ºC) Thermal Conductivity (W/m K).

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