코어/쉘 부피비에 따른 섬유상 Al 2 O 3 -(m-ZrO 2 )/t-ZrO 2 복합재료의 미세조직 및 물성

김기현; 이병택; Ki-Hyun Kim; Byong-Taek Lee

Korean Journal of Materials Research, Vol.15, No.12, 751-755, December, 2005

DOI10.3740/MRSK.2005.15.12.751 Export Citation

코어/쉘 부피비에 따른 섬유상 Al 2 O 3 -(m-ZrO 2 )/t-ZrO 2 복합재료의 미세조직 및 물성

Microstructure and Material Properties of Fibrous Al 2 O 3 -(m-ZrO 2 )/t-ZrO 2 Composite Depending on the Volume Fraction of Core/Shell

김기현, 이병택^†

공주대학교 신소재공학부

Ki-Hyun Kim, and Byong-Taek Lee^†

School of Advanced Materials Engineering, Kongju National University, 182, Shinkawan-dong, Kongju City, Cungnam, 314-701, Korea

E-mail:

Fibrous Al 2 O 3 ?(m?ZrO 2 )/t?ZrO 2 composites having core/shell structure were fabricated by multi-extrusion process. The effect o volume fraction between core ( Al 2 O 3 ?(m?ZrO 2 ) ) and shell ( t?ZrO 2 was investigated to understand the relationship between microstructure and material properites, in which the volume fractions of core and shell were varied as 40:60, 50:50 and 60:40. The material properties o hardness and bending strength were increased as the volume fraction of core was increased, and their maximum values were about 1320 Hv and 750MPa, respectively. However, as the volume fraction of core increased, the values of relative density and fracture toughness were decreased from 97.1 to 96.5% and from 6.5MPa?m 1/2 to 5.7MPa?m 1/2 , respectively.

Keywords:fibrous microstructure;multi-extrusion process

[References]

Farmer SC, Sayir A, Eng. Fracture Mechanics, 69, 1015 (2002)
Tarlazzi A, Roncari E, Pinasco P, Guicciardi S, Melandri C, De Portu G, Wear, 29, 244 (2003)
Lee BT, Kang IC, Cho SH, Song HY, J. Am. Ceram. Soc., 88(8), 2262 (2005)
Fruh HJ, Willmann G, Pfaff HG, Biomater., 18, 373 (1997)
Lee BT, Hiraga K, J. Mater. Res., 9, 1199 (1994)
Lee BT, Nishiyama N, Hiraga K, Mater. Trans. JIM, 34, 682 (1993)
Miyazaki H, Yoshizwa Y, Hirao K, Mater. Lett., 58, 1410 (2004)
Lee BT, Jang DH, Kang IC, Lee CW, J. Am. Ceram. Soc., 88(10), 2874 (2005)
Lee BT, Kim KH, Han JK, J. Mater. Res., 19, 3234 (2004)
Kim TS, Kim KH, Goto T, Lee BT, Mater. Trans. JIM, 45, 431 (2004)
Kim KH, Kim TS, Lee BT, Korean J. Mater. Res., 13, 4 (2003)
Evans AG, Charles EA, J. Am. Ceram. Soc., 59, 371 (1976)

[1] Farmer SC, Sayir A, Eng. Fracture Mechanics, 69, 1015 (2002)

[2] Tarlazzi A, Roncari E, Pinasco P, Guicciardi S, Melandri C, De Portu G, Wear, 29, 244 (2003)

[3] Lee BT, Kang IC, Cho SH, Song HY, J. Am. Ceram. Soc., 88(8), 2262 (2005)

[4] Fruh HJ, Willmann G, Pfaff HG, Biomater., 18, 373 (1997)

[5] Lee BT, Hiraga K, J. Mater. Res., 9, 1199 (1994)

[6] Lee BT, Nishiyama N, Hiraga K, Mater. Trans. JIM, 34, 682 (1993)

[7] Miyazaki H, Yoshizwa Y, Hirao K, Mater. Lett., 58, 1410 (2004)

[8] Lee BT, Jang DH, Kang IC, Lee CW, J. Am. Ceram. Soc., 88(10), 2874 (2005)

[9] Lee BT, Kim KH, Han JK, J. Mater. Res., 19, 3234 (2004)

[10] Kim TS, Kim KH, Goto T, Lee BT, Mater. Trans. JIM, 45, 431 (2004)

[11] Kim KH, Kim TS, Lee BT, Korean J. Mater. Res., 13, 4 (2003)

[12] Evans AG, Charles EA, J. Am. Ceram. Soc., 59, 371 (1976)