Joining of Y-TZP parts

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · Scripta Metallurgica et Materialia

DOI:https://doi.org/10.1016/0956-716X(95)00206-B· OSTI ID:103596

Ye, J; Dominguez-Rodriguez, A ^[1]

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1. Universidad de Sevilla-CSIC (Spain)

Based on the grain boundary sliding (GBS) mechanism, the authors used the structural superplasticity of a 3 mol% Y{sub 2}O{sub 3}-tetragonal ZrO{sub 2} polycrystals (Y-TZP) as a new technique to join two pieces of this material. The fully dense 3 mol% Y-TZP material was obtained from 3Y-TZP powders (Tosoh Co. Japan) which were cold pressed, sintered at 1,430 C for 2 hours and then isostatic hot pressed at 1,400 C for 2 hours. The average grain size of the starting (as-HIPed) material was 0.3 {micro}m. This material was annealed at 1,600 C, for different amounts of time in order to get grain sizes of 0.5, 0.8 and 1.6 {micro}m. From these four type of materials, samples of dimensions 5x3x3 mm were cut and polished using diamond paste of decreasing sizes down to 1 {micro}m. Compression tests at constant cross head speed were carried out in air, and at temperatures between 1,350 and 1,450 C. Microstructural observations and macroscopic parameters as K{sub c} and H{sub v} in Y-TZP show clearly that grain boundary sliding can be used to perform the joining of ceramics through a very small deformation at lower temperatures and for shorter period of time than for direct diffusional bonding.

• OSTI ID: 103596
• Journal Information: Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 3 Vol. 33; ISSN 0956-716X; ISSN SCRMEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRACKS
GRAIN BOUNDARIES
GRAIN SIZE
JOINING
MICROSTRUCTURE
PLASTICITY
SAMPLE PREPARATION
SCANNING ELECTRON MICROSCOPY
YTTRIUM OXIDES
ZIRCONIUM OXIDES