Publication Date:
2014-09-06
Description:
Nano-sized Ce 0.79 Gd 0.2 Cu 0.01 O 2-δ (CGCO) and Ce 0.80 Gd 0.2 O 2-δ (CGO) powders were synthesized via a facile PVA-assisted combustion method. Full densification can be achieved at much lower temperature (950°C) with minor CuO doping (1 mol%, CGCO) as compared with CGO (1400°C); meanwhile, mechanical strength can be enhanced with CuO co-doping. The CGCO sintered at 1100°C possesses a relative density of 98.80% and biaxial flexural strength of 302 ± 35 MPa, which is higher than those of CGO sintered at 1400°C (96.43%, 250 ± 39 MPa). A tentative microstructural analysis indicates that this strength enhancement can be attributed to a change in fracture mode from partial to complete transgranule dominant.
Print ISSN:
1546-542X
Electronic ISSN:
1744-7402
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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