Strengthening alumina ceramic matrix nanocomposites using spark plasma sintering

Metal matrix nanocomposites (MMNCs) are anticipated to offer significantly better performance than existing superalloys. Nickel/alumina nanocomposite samples were fabricated with a powder metallurgy method, combining high-energy ball milling (HEBM) and spark plasma sintering (SPS). The objective of this research is to determine the effect of alumina nanoparticle fraction and HEBM parameters on the powder preparation and sintering processes, and resultant microstructure and properties. Nickel-based powders containing various fractions (1, 5 and 15 vol.%) alumina nanoparticles were prepared by HEBM. The initial particle sizes were 44 μm and 50 nm for nickel and alumina, respectively. The milling process was conducted by starting with mixing at 250 rpm for 5 min, followed by cycling operation at high and low speeds (1200 rpm for 4 min and 150 rpm for 1 min). Samples at different milling times (30, 60, 90 and 120 min) of each composition were obtained. Scanning electron microscopy (SEM) was used to evaluate the dispersion of nanoparticles in the powders at different milling times. SPS technique was used for consolidation of the prepared powders. SEM images showed that alumina nanoparticles are homogeneously dispersed in the metal matrix in the sample containing 15 vol.% alumina. Hardness measurements in cross sections of SPSed samples showed higher values for Ni/Al2O3 MMNC compared to pure Ni.

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Fiber-Reinforced Ceramic Matrix Composites Processed by a Hybrid Process Based on Chemical Vapor Infiltration, Slurry Impregnation and Spark Plasma Sintering

Advanced Processing and Manufacturing Technologies for Structural and Multifunctional Materials IV - Ceramic Engineering and Science Proceedings ◽

10.1002/9780470944066.ch5 ◽

2010 ◽

pp. 45-58

Author(s):

Jerome Magnant ◽

René Pailler ◽

Yann Le Petitcorps ◽

Laurence Maillé ◽

Alain Guette ◽

...

Keyword(s):

Spark Plasma Sintering ◽

Chemical Vapor ◽

Ceramic Matrix Composites ◽

Ceramic Matrix ◽

Chemical Vapor Infiltration ◽

Hybrid Process ◽

Matrix Composites ◽

Slurry Impregnation ◽

Plasma Sintering ◽

Spark Plasma

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Spark Plasma Sintering of Ceramic Matrix Composite of TiC: Microstructure, Densification, and Mechanical Properties: A Review

10.1007/978-981-16-3641-7_13 ◽

2021 ◽

pp. 93-101

Author(s):

Samson Dare Oguntuyi ◽

Oluwagbenga Johnson ◽

Mxolisi Brendon Shongwe

Keyword(s):

Mechanical Properties ◽

Spark Plasma Sintering ◽

Matrix Composite ◽

Ceramic Matrix Composite ◽

Ceramic Matrix ◽

Plasma Sintering ◽

Spark Plasma

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Microstructure and Mechanical Properties of ZrO2(Y2O3)-Al2O3 Nano Composites Prepared by Spark Plasma Sintering

ASME 2008 International Manufacturing Science and Engineering Conference, Volume 1 ◽

10.1115/msec_icmp2008-72322 ◽

2008 ◽

Author(s):

Shufeng Li ◽

Hiroshi Izui ◽

Michiharu Okano ◽

Weihua Zhang ◽

Taku Watanabe

Keyword(s):

Mechanical Properties ◽

Spark Plasma Sintering ◽

Sintering Temperature ◽

Alumina Ceramic ◽

The Other ◽

Sintering Behavior ◽

Nanocomposite Powder ◽

Mixed Powder ◽

Plasma Sintering ◽

Spark Plasma

Zirconia (Y2O3)-alumina ceramic nanocomposites were fabricated by spark plasma sintering (SPS). A commercially available nanocomposite powder TZP-3Y20A was used as starting powder, the other from conventionally mechanical mixed powder 3YSZ-20A used for comparison. The effect of sintering temperature on the densification, sintering behavior, mechanical properties, and microstructure of the composites were investigated. The results show that the density increase with increasing of sintering temperature, and thus mechanical properties were strengthened with enhancing of densification. The nanocomposite powder TZP-3Y20A was easily sintered and good mechanical properties were achieved, compared with the powder from conventionally mechanical mixed, where the maximum strength and toughness of composites are 967 MPa and 5.27 MPam1/2, respectively.

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