Effect of Alumina Additions on Mechanical and Electrical Properties of 8mol% Yttria-Stabilized Zirconia Prepared by Spark Plasma Sintering |
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| Journal | Key Engineering Materials (Volumes 317 - 318) |
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| Volume | The Science of Engineering Ceramics III |
| Edited by | T. Ohji, T. Sekino and K. Niihara |
| Pages | 917-920 |
| DOI | 10.4028/www.scientific.net/KEM.317-318.917 |
| Citation | Jae Kwang Kim et al., 2006, Key Engineering Materials, 317-318, 917 |
| Online since | August, 2006 |
| Authors | Jae Kwang Kim, Kyung Hun Kim, Yong Ho Choa, Jong Won Yoon, Kwang Bo Shim |
| Keywords | 8YSZ-Al2O3, Bend Strength, Fracture Toughness, Grain Boundary Conductivity |
| Abstract | Dense 8mol% yttria-stabilized zirconia (8YSZ) consisting of submicrometer-sized grains was prepared using spark plasma sintering (SPS) along with Al2O3 additives. The starting powder with average particle size of 50nm was densified to 98% of the relative density with short sintering time (5min) at 1200 while preserving a submicrometer grain size. The fracture toughness and bending strength showed maximum values of 2.54MPam1/2 and 380MPa at 2vol% alumina-added 8YSZ, due mainly to the higher relative density and small grain size. The electrical conductivity of 2vol% alumina-added 8YSZ was 0.0278 S/cm at 700 in airThus, alumina additions in 8YSZ using the SPS method are an effective process to improve the mechanical strength and electrical conductivity. |
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