Abstract

Dense composite materials Al₂O₃–SiC_w with a whisker volume fraction of up to 30 vol% were formed by the methods of liquid-phase sintering and hot pressing. In the presence of 10 vol % SiC_w, the density of liquid-phase sintered and hot-pressed materials is decreased to 97.3 and 98.0% of the theoretical density, respectively. For liquid-phase sintered materials, the compositions Al₂O₃ 20 vol % SiC_w have maximum characteristics: σ_ben = 416 ± 15 MPa and K_1C = 4.74 ± 0.12 MPa m^1/2. The introduction of 30 vol % SiC_w impedes active compaction of the materials (ρ_rel = 89.3% of the theoretical density). For hot-pressed materials, the highest characteristics were determined at 30 vol % SiC_w: σ_ben = 774 ± 15 MPa and K_1C = 5.94 ± 0.12 MPa m^1/2. For higher volume fractions, the strength of the Al₂O₃–SiC_w composite materials decreases.

中文翻译：

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致密复合材料Al2O3-SiCw的形成

摘要

通过液相烧结和热压的方法形成了致密的复合材料Al ₂ O ₃ -SiC _w，其晶须体积分数高达30 vol%。在 10 vol% SiC _w的存在下，液相烧结和热压材料的密度分别降低到理论密度的 97.3% 和 98.0%。对于液相烧结材料，Al ₂ O ₃ 20 vol % SiC _{w 组成}具有最大特性：σ _ben = 416 ± 15 MPa 和K _1C = 4.74 ± 0.12 MPa m ^1/2。引入 30 vol % SiC _w阻碍材料的主动压实（ρ _rel = 理论密度的 89.3%）。对于热压材料，最高特性在 30 vol% SiC _{w 时}确定：σ _ben = 774 ± 15 MPa 和K _1C = 5.94 ± 0.12 MPa m ^1/2。对于更高的体积分数，Al ₂ O ₃ -SiC _w复合材料的强度降低。