SINTERING OF α-SiC WITH Y２O３-Al２O３-SiO２ GLASS ADDITIVES

Autor:	Chen-Yu Hsieh, 謝震宇
Rok vydání:	2012
Druh dokumentu:	學位論文 ; thesis
Popis:	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.
Databáze:	Networked Digital Library of Theses & Dissertations
Externí odkaz:	http://ndltd.ncl.edu.tw/handle/98679932658405446128 Zobrazit plný text záznamu