ZrO2의 분말크기가 ZTA의 기계적 물성에 미치는 영향

손정호; 신형섭; Jeongho Sohn; Hyung-Sup Shin

Korean Journal of Materials Research, Vol.24, No.12, 652-657, December, 2014

DOI10.3740/MRSK.2014.24.12.652 Export Citation

ZrO2의 분말크기가 ZTA의 기계적 물성에 미치는 영향

The Effect of Zirconia Particle Size on Mechanical Properties of Zirconia Toughened Alumina

손정호, 신형섭^{1, †}

가야대학교 항만물류학부
¹가야대학교 안경광학과

Jeongho Sohn, and Hyung-Sup Shin^{1, †}

School of Port and Logistics, Kaya University, #208, Samgyero, Simhae, Gyeongsangnamdo 621-748, Korea
¹Department of Optometry, Kaya University, #208, Samgyero, Gimhae, Gyeongsangnamdo 621-748, Korea

E-mail:

The purpose of this study was to investigate the microstructures and mechanical properties of zirconia toughened alumina (ZTA) ceramics prepared from two kinds of 3Y-TZP powders. ZTA composites were prepared by adding two kinds of 3Y-TZP powders, 3YEH (BET = 7 m2/g) and 3YEM (BET = 16 m2/g), to α-alumina in the range of 5-25 wt%. It was found that the microstructure photographs of the ZTA composites showed that the average grain size of alumina decreased as the content of zirconia increased. In our present study, specimens containing 3YEM zirconia exhibited smaller grain sizes compared to those of 3YEH zirconia. The Vickers hardness of the ZTA composites that were sintered at 1600 oC for 2 hrs was found to smoothly decrease with increasing zirconia content because of the low Young modulus in zirconia. The Vickers hardness of the ZTA containing 3YEH zirconia was greater than that of the 3YEM zirconia. In substance, the fracture toughness (K1c) of the ZTA composites increased as the content of zirconia increased. The fracture toughness (K1c) of ZTA containing 3YEM zirconia was greater than that of 3YEH zirconia.

Keywords:zirconia;alumina;ZTA;toughness;Vickers hardness

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[1] Garvie RC, Hannik RH, Pascoe RT, Nature, 258, 703 (1975)

[2] Marshall DB, J. Am. Ceram. Soc., 69(3), 173 (1986)

[3] Hannink RHJ, Kelly PM, Muddle BC, J. Am. Ceram. Soc., 83(3), 461 (2000)

[4] Wang J, Stevens R, J. Mater. Sci., 34, 3421 (1989)

[5] Casellas D, Rafols I, Llanes L, Anglada M, Int. J. Refract. Meter. H., 17, 11 (1999)

[6] Bartolome JF, Moya JSP, Martin A, Pastor JY, Llorca J, J. Eur. Ceram. Soc., 26, 2619 (2006)

[7] Szutkowska M, J. Achiev. Mater. Manuf. Eng., 54(2), 202 (2012)

[8] Lange FF, J. Mater. Sci., 4(17), 247 (1982)

[9] Garvie RC, Adv. Ceram., 12, 55 (1984)

[10] Orange G, Fantozzi G, Homerin P, Thevenot F, Leriche A, Cambier F, Adv. Ceram., 24, 1075 (1988)

[11] De Aza AH, Chevalier J, Fantozzi G, Schehl M, Torrecillas R, Biomaterials, 23, 937 (2002)

[12] Huang CW, Weng MT, Wei WCJ, J. Ceram. Process. Res., 9(3), 221 (2008)

[13] Alsebaie A, Olabi AG, Rafferty A, Prescott T, The fourth Arabic congress in material science, 2, 390, Al. fath university, Libya, (2005).