Effect of alumina additions on mechanical and electrical properties of 8mol% yttria-stabilized zirconia prepared by spark pplasma sintering
- Title
- Effect of alumina additions on mechanical and electrical properties of 8mol% yttria-stabilized zirconia prepared by spark pplasma sintering
- Author
- 좌용호
- Keywords
- 8YSZ-Al2O3; fracture toughness; bending strength; grain boundary conductivity
- Issue Date
- 2006-08
- Publisher
- Trans Tech Publications Ltd.
- Citation
- Key Engineering Materials, v. 317-318, Page. 917-920
- Abstract
- Dense 8 mol% 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 degrees C while preserving a submicrometer grain size. The fracture toughness and bending strength showed maximum values of 2.54MPam(1/2) 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 degrees C in air. Thus, alumina additions in 8YSZ using the SPS method are an effective process to improve the mechanical strength and electrical conductivity.
- URI
- https://www.scientific.net/KEM.317-318.917https://repository.hanyang.ac.kr/handle/20.500.11754/181492
- ISSN
- 1013-9826;1662-9795
- DOI
- 10.4028/www.scientific.net/KEM.317-318.917
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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