September 2003 Wear Behavior of Al/Al-Zr Laminated Composites 1553 high-performance alumina. Due to the presence of residual com- 中P.ZCa.D.J.Gren cal Characterization ol pressive tresses, the laminated composite A/AZ exhibits both AOJ∠ rO. Hybrid Lami 534(1998 higher hardness and apparent toughness. From these results it is I. She, S. Scheppokat, R. Janssen, and N Reaction Bonded Three. yer Alumina-Based Composites with Improved Damage Resistance, "J,An evident that the presence of residual compressive stresses leads to Ceram Sxc, 81 (511374-76(1998 an improvement in resistance to damage induced by static contact. H. Tomaszewski, J. Strzeszewski, and w. Gebicki,"The Role of Residual The friction coefficients for the pairings of alumina pins with in Layered Composites of Y- ro, and Al.O, "/. Eur. Ceran. Seve.19 laminated composite A/AZ were always lower than those for materials MA and AA A. Tarlazti, E. Roncari P. Pinasco. S. Guicciardi, C. Melandri. and G, de Portu, Tribological Behaviour of Al O,/ ZrO, Laminated Composites, "Wenr, 244 The data for specific wear show how the presence of compres ive stresses, and therefore an improvement in the apparent surface C Fiori and Gi, de Portu. "Tape Casting: A Technique for Preparing and Studying tance of the alumina when the applied loads and sliding speeds &. ober 19%p. 213-25 in Proceedings of the British Ceramic Society. No38 toughness, plays an important role in improving the wear resis- R. w. Davidge. Shelton, Stoke-on-Trent. U.K. 1986 G. ce Portu. C, Fion, and O. Sbaizero,"Fabrication. Microstructure, an macrocracking (under the experimental conditions used in the study, i. e, low contact temperature). Even under the severest Ceramies, VoL. 24. Science and Technology ef Zinnia Il/ Edited by SSomia Yamam o and H. Yanagida. American Ceramic Society. Columbus OH, 1988. and macrocracking. followed by limited removal of material, and Defects, "/.Am. Ceram, Sox 8018)1929-39(97 Berane Densi ication of rating conditions. the wear behavior of the laminated compos- ite A/AZ was still better than that of the other materials, Micro- Alumina/Zirconia Hybrid in, and G.L.Messing."Const imited abrasion by a third body were identified as wear Alumin al zircon ia Hybrid Laminates: l. viscoelastic stress Computation 1. a. consistent removal of a plastically deformed surface layer and European Standand No, prEN 623-3 (rev. 20X)), Advanced Technical Ceram consequently, a more consistent abrasion mechanism trigger a ics-Monolithic Ceramies--General and Textural Properties, Part 3: Determination transition to severe wear. The production of laminated strue of Grain Size and Size Distribution(Characterized by the Linear Intercept Method) tures with compressive residual stresses at the surface thus European Standard No, prEN 84.34 (rev. 2001). Advanced Technical Ceram cs-Monolithic Cenamics-Mechanical Properties at Room Temperature. Part 4 makes it possible to obtain materials whose tribological behav Vickers, Knoop and Rockwell Superficial Hardness Tests ior is superior to that of stress-free materials(within the range FP Knudsen. ""Eflect of Porosity on Young's Modulus of Alumina."/Au of studied experimental conditions) Cera SN.4512194-95(1962 G. de Portu and P, Vincenzini, "Youngs Modulus-Porosaty Relationship for Alumina Substrates. Cer. int, 5 141 165-68(1979 D. G. Munz, J. L Shannon Jr, and R. T. Bubsey," Fracture Toughness Acknowledgments Calculation from Maximum Load in Four Point Bend Tests of Chevron Notch imens," Int J. Fract. 16. R137-R141(1980) We are grateful to M, F. Ashby. H. S. Kong, and J. Abulawi G. R Anstis, P. Chantikul, B. R. Lawn, and D, B. Marshall."A Critical ftware and user manual used to generate the temperature maps. We wo Evaluation of Indentation Techniques for Measuring Fracture Tou to thank G. C: Celotti for the x-ray analysis and F. Monteverde observation. Thanks are also due to R. Morrell for the helpful discussion atthacharya, Residual Surface Stress by Localized Contact Creep. "/. Mater. Rex 12111210-17(1997) >C. P. Alpert. H M. Chan. S. J. Bennison, and B. R Lawn."Temperature References Dependence of Alumina- Based Ceramics, "J. Ann Ceram. Soc. 71.: A. J. Perez-UnzuetaL, J. H. Beynon, and M. G ShM. Shimada, K. Matsushita. S. Kuratani. T: Okamoto, M Koizumi. K Tsukuma Atmosphere on the Wear of Sintered Alumina. "Wear and T. Tsukidate, " Temperature Dependence of Young,s Modulus and Intemal L M. Hutchings. Tribology: Friction and Wearn Er Materials. Edward /. Am c en A smin silicon Nitride, and Partially Stabilized Zirconia Ceramic T E. Fischer, M. P. Anderson, and S, Jahanmir, "Influence of Fracture Toughne IT. Fett, M. Missbach, and D Munz."Failure Behaviour of Al, O, with Glassy le Wear Resistance of Yitria-Doped Zirconium Oxide, " Am. Ceram Soc.72 PM. F. Ashhy, H. S. Kong. and J. Abulawi, T-Maps. version 4.0.revised. Cambridge University Engineering Department. Cambridge, U.K.1992 D. J, Green. "A Technique for Introducing Surface Compression into Zirconia ceramics,J Am, Ceran. Soc. 66IIOIC-178-C-179(1983) M. F. Ashby, Deformation Mechanism Maps: Ch. 14 Press, Oxford U.K G. de Portu and S. Conoci "Simplified Equation for Evaluating the Intluence of Surface Residual Stresses on the Toughness of Zirconia Ceramics, "/. An. Ceram Soc.80|1213242-44(1997. m tie Properties at Contact Surfaces. "Acta Mater, 47|1413915-26(1999) S. Conoci, C. Melandr, and G de Portu, "Wear of Y-TZP Containing Compres- sive Residual Stresses at the Surface. "J. Mater: Sci., 34, 1(19-15(1999) 7S. Ho, C. Hillman. F. F. Lange, and Z. Suo, "Surface Cracking in Layers under Biaxial Residual Compressive Stress, "J An Cerum Sox:,78 191 2353-59(1995 graphis, VoL. 2 Edited by P, Walls. C. Sorrell, and A. Ruys. Australasian Ceramic R Lakshminarayanan, D. K Shetty, and R. A. Cutler, "Toughening of Society, c/o ANSTO Materials Division, Menal, NSW, Australia, 1999 K. Adachi, K. Kato, and N. Chen. "Wear Map of Ceramies "Wear, 203-204 Ceramic Composites with Residual Surface Compression,"J Am Ceram. Sec. 79I11291-301(1997 79-87(1996 "D-H. Kuo and W. M. Kriven, "A Strong and Damage- Tolerant Oxide Laminate," D. B. Marshall, M. D Drory, R. L. Loh, and A. G. Evans. "The Thermal Fracture Am. Ceran.Soc.80192421-24(197) f Alumina"p 336 in Fracture in Ceramic Materials. Edited by A. G. Evans. Noyes Publications, Park Ridge N. 198-4