SINTERING OF α-SiC WITH Y２O３-Al２O３-SiO２ GLASS ADDITIVES
碩士 === 大同大學 === 材料工程學系(所) === 100 === Non-reactive liquid-phase sintering of SiC has been studied using different additives. Additives were wet ball milling with SiC powder, dry-pressing at 50MPa to form disc-shaped pellets, then were sintered at 1200~15000C for 4 hours. The results indicated SiC sa...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2012
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| Online Access: | http://ndltd.ncl.edu.tw/handle/98679932658405446128 |
| Summary: | 碩士 === 大同大學 === 材料工程學系(所) === 100 === Non-reactive liquid-phase sintering of SiC has been studied using different additives. Additives were wet ball milling with SiC powder, dry-pressing at 50MPa to form disc-shaped pellets, then were sintered at 1200~15000C for 4 hours. The results indicated SiC samples with Y2O3-Al2O3-SiO2 , Y2O3-Al2O3-SiO2-CaO , Ca-Al-Si-O glass additive did not show any densification after pressureless sintering. This experiment also used low melting point of Ca-Al-Si-O and Mg-B-Si-O glass as additives, and hot-pressed. The hot-pressed samples did not significantly densified either.
Results indicated pressureless sintering SiC+30vol% Y2O3-Al2O3-SiO2 had the highest compressive strength of 71MPa with bulk density 1.9 g/cm3.Hot-pressed SiC+30vol% Mg-B-Si-O glass had compressive strength of 26MPa and bulk density of 2.2 g/cm3.
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