SiC 휘스커 강화 Al 2 O 3 복합재료의 고인화

김연직; 송준희; Yon Jig Kim; Jun Hee Song

Korean Journal of Materials Research, Vol.14, No.9, 649-654, September, 2004

DOI10.3740/MRSK.2004.14.9.649 Export Citation

SiC 휘스커 강화 Al 2 O 3 복합재료의 고인화

Toughening of SiC Whisker Reinforced Al 2 O 3 Composite

김연직^†, 송준희¹

국립 익산대학 산업설비제어과
¹전북대학교 공과대학 기계공학부 공업기술연구센터

Yon Jig Kim^†, and Jun Hee Song¹

Dept. of Industials Facilities Control, Iksan National College, Iksan 570-752, Korea
¹Faculth of Mechanical Engineering, Research Institute of Industrial Technology, Chonbuk National University, Chongju 561-756, Korea

E-mail:

In this paper, the fracture toughness and mechanisms of failure in a random SiC-whisker/ Al 2 O 3 ceramic composite were investigated using in situ observations during mode I(opening) loading. SiC w /Al 2 O 3 composite was obtained by hot press sintering of Al 2 O 3 powder and SiC whisker as the matrix and reinforcement, respectively. The whisker and powder were mixed using a turbo mill. The composite was produced at SiC whisker volume fraction of 0.3% . Compared with monolithic Al 2 O 3 , fracture toughness enhancement was observed in SiC w /Al 2 O 3 composite. This improved fracture toughness was attributed to SiC whisker bridging and crack deflection. SiC w /Al 2 O 3 composite exhibited typically brittle fracture behavior, but a fracture process zone was observed in this composite. This means that the load versus load-line displacement curve of SiC w /Al 2 O 3 composite from a fracture test may involve a small non-linear region near the peak load.

Keywords:fracture process zone;crack-tip microcracking zone;crack-flank fiber bridging;crack deflection;breakage;interfacial shear traction

[References]

Ashby MF, Jones DRH, International Series on Materials Science and Technology, 39, 162-177, Pergamon Press, Oxford, England (1986) (1986)
Ritter JE, Fundamentals of Ceramic Engineering, p.191-221, Vincenzini P, Elsevier Applied Science, London & New York(1991) (1991)
Lee SK, Kim CH, J. American Ceramic Soc., 77(6), 1655 (1994)
Faber KT, Evans AG, Acta Metallurgy, 31(4), 565 (1983)
Liu H, Fine ME, Cheng HS, J. American Ceramic Soc., 77(1), 179 (1994)
Garvie RC, Hannink RH, Pascoe RT, Nature, 258(703) (1975)
ASTM E 1820, Annual Book of ASTM Standards, 3.01, 1000 (2000) (2000)
JIS R 1607, Japanese Standards Association (1995) (1995)
Li VC, Hashida T, J. Mater. Sci. Letters, 12, 898 (1993)
Hashida T, Li VC, J. American Ceramic Soc., 77(6), 1553 (1994)
Kim YJ, Hashida T, Takahashi H, Fujii K, Kanazawa M, J. Japan Thermal Spraying Soc., 33(2), 73 (1996)

[1] Ashby MF, Jones DRH, International Series on Materials Science and Technology, 39, 162-177, Pergamon Press, Oxford, England (1986) (1986)

[2] Ritter JE, Fundamentals of Ceramic Engineering, p.191-221, Vincenzini P, Elsevier Applied Science, London & New York(1991) (1991)

[3] Lee SK, Kim CH, J. American Ceramic Soc., 77(6), 1655 (1994)

[4] Faber KT, Evans AG, Acta Metallurgy, 31(4), 565 (1983)

[5] Liu H, Fine ME, Cheng HS, J. American Ceramic Soc., 77(1), 179 (1994)

[6] Garvie RC, Hannink RH, Pascoe RT, Nature, 258(703) (1975)

[7] ASTM E 1820, Annual Book of ASTM Standards, 3.01, 1000 (2000) (2000)

[8] JIS R 1607, Japanese Standards Association (1995) (1995)

[9] Li VC, Hashida T, J. Mater. Sci. Letters, 12, 898 (1993)

[10] Hashida T, Li VC, J. American Ceramic Soc., 77(6), 1553 (1994)

[11] Kim YJ, Hashida T, Takahashi H, Fujii K, Kanazawa M, J. Japan Thermal Spraying Soc., 33(2), 73 (1996)