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- W2899482860 abstract "Several compositions of calcium stabilized sialon ceramics were synthesized by using nano-size starting powder precursors and spark plasma sintering technique at a relatively low temperature of 1500 °C. The formation of calcium alpha/beta-sialons was investigated for the compositions represented by Cam/2Si12-(m+n)Alm+nOnN16-n where m and n values were varied from 0.6 to 1.6 and 0.4–1.6, respectively. Phase analysis of the selected compositions helped in developing the phase boundary between alpha and alpha/beta phase regimes. Effect of m and n values on the evolution of the final phase(s), densification and mechanical properties were evaluated. All samples yielded densified ceramics with density values (3.13–3.19 g/cm3) comparable with those reported in the literature for similar compositions and synthesized at temperatures greater than 1700 °C via conventional sintering techniques. Vickers hardness value HV10 of 20 GPa was measured for the Ca0.5Si10.6Al1.4O0.4N15.6 composition (with m = 1.0 and n = 0.4) synthesized at 1500 °C. An increase in n value (higher oxide content) was observed to facilitate the formation of beta-sialon and AlN polytype phases leading to an increase in fracture toughness but a decrease in Vickers hardness." @default.
- W2899482860 created "2018-11-09" @default.
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- W2899482860 date "2019-05-01" @default.
- W2899482860 modified "2023-10-18" @default.
- W2899482860 title "Effect of nano-size oxy-nitride starting precursors on spark plasma sintering of calcium sialons along the alpha/(alpha + beta) phase boundary" @default.
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- W2899482860 doi "https://doi.org/10.1016/j.ceramint.2018.11.005" @default.
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