Microstructure and Selected Properties of Al2O3 Matrix Composites Fabricated by Pulse Plasma Sintering of Al2O3 and Pre-composite Powder (NiAl–Al2O3).

Autor: Zygmuntowicz, Justyna, Konopka, Katarzyna, Krasnowski, Marek, Piotrkiewicz, Paulina, Wachowski, Marcin, Wieczorek-Czarnocka, Monika, Pakieła, Zbigniew, Płociński, Tomasz, Cymerman, Konrad, Żurowski, Radosław
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Zdroj: Metallurgical & Materials Transactions. Part A; Dec2024, Vol. 55 Issue 12, p5160-5176, 17p
Abstrakt: Paper-related production of composite materials from Al2O3-pre-composite powder (NiAl–10 wt pct Al2O3). PPS allowed for forming ceramic–intermetallic composites. MA produced the pre-composite powder. Six series of composites were made, differing in temperature (1200 °C, 1300 °C, 1400 °C) and content of pre-composite powder (2.5 and 5 wt pct with respect to the amount of Al2O3). Highest hardness was obtained for composite series sintered at 1300 °C. Both series, with various pre-composite powder content, had a value of 20.8 to 20.9 GPa. Samples containing 2.5 wt pct pre-composite powder sintered at 1200 °C were highest KIC value of 4.72 ± 0.34 MPa·m0.5. Interestingly, the same value was obtained in composites containing 5 wt pct pre-composite powder sintered at 1300 °C. For both series with different pre-composite powder content, sintering at 1400 °C obtained the highest strength. For composites containing 2.5 wt pct pre-composite powder, splitting tensile strength value was 255.98 MPa, while for samples with 5 wt pct, pre-composite powder was 264.01 MPa [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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