Preparation of AlN-ZrO2(Ca) Composites by Pressureless Sintering

Yan Wang; Rong Lin Wang; Jing Long Bu; Li Xue Yu

doi:10.4028/www.scientific.net/AMR.415-417.306

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 415-417Preparation of AlN-ZrO2(Ca) Composites by...

Preparation of AlN-ZrO₂(Ca) Composites by Pressureless Sintering

Abstract:

AlN-ZrO₂(Ca) composites were prepared with two kinds of Ca-stabilized zirconia (ZrO₂(Ca), i.e Ca-PSZ, particle size d₅₀=65μm and d₅₀=7.5μm) and three kinds of AlN power (d₅₀=15μm, d₅₀=0.5μm and d₅₀=40nm) as raw material in N2 atmosphere by pressureless sintering at 1850 oC. The phase compositions and microstructures of composites were investigated by XRD, SEM and EDS.The sintering performance of the composites was measured by the checking of the bending strength, and the apparent porosity of samples. The results showed that phase compositions of the composites consisted of major phases C-ZrO₂ and AlN and minor phase CaAl₁₂O₁₉. It was harder that AlN-ZrO₂(Ca) composites were sintered than ZrO₂(Ca) material. It was major cause that phase CaAl₁₂O₁₉ formed and its abnormal growed in the boundary layer between AlN particle and ZrO₂(Ca) matrix. With 2mm AlN particles as raw material, AlN-ZrO₂(Ca) composites had better sintering performance when concent of AlN equaled to 8%.

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Periodical:

Advanced Materials Research (Volumes 415-417)

Pages:

306-309

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.415-417.306

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Online since:

December 2011

Authors:

Yan Wang, Rong Lin Wang, Jing Long Bu, Li Xue Yu

Keywords:

Aluminum Nitride (AlN), Ca-PSZ, Composite, Performance, Pressureless Sintering

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