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URN etd-0905112-140531 Statistics This thesis had been viewed 1377 times. Download 2 times. Author Chen-Yu Hsieh Author's Email Address No Public. Department Materials Engineering Year 2011 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 80 Title SINTERING OF α-SiC WITH Y２O３-Al２O３-SiO２ GLASS ADDITIVES Keyword silicon carbide liquid phase sintering sintering aids sintering aids liquid phase sintering silicon carbide Abstract 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.
Advisor Committee Yung-jen Lin - advisor
Jiin-jyh Shyu - co-chair
Sea-fue Wang - co-chair
Files Date of Defense 2012-07-17 Date of Submission 2012-09-05