Effect of Al on Al_4SiC_4-Al_4O_4C Composite Synthesized from Kaolinite Grog

作     者：DENG Chengji YU Chao ZHU Hongxi KUANG Jianlei YUAN Wenjie 

作者机构：The Key State Laboratory Breeding Base of Refractories and Ceramics Wuhan University of Science and Technology Wuhan 430081 China 

出 版 物：《China's Refractories》 (中国耐火材料（英文版）)

年 卷 期：2012年第21卷第3期

页      面：16-19页

学科分类：080706[工学-化工过程机械] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Al4SiC4 - Al4O4C aluminum kaolinite oxidation resistance 

摘      要：The Al4SiC4 - Al4 O4 C composites were synthesized using 1： 6. 5：2.6 of nudar rntio of kaolinite grog powder, carbon black, and aluminum powder as basic formulation, fixing the additions f kaolinite grog powder and carbon black, vauing aluminum powder addition to make its proportion from 2. 6 to 3. 9, 5. 5, 7. 0, 8. 6, and 10. 4, respectively, adding phenolic resin as binder and absolute alcohol as dispersant, m＆ing well, pressing, drying, and firing at 1 700 for 2 h in a corundum tubularfizrnace in flowing argon. The eeffect cf Al addition on phase tvmposition and mierostrture of Al4SiC4 - Al4 O4 C composites wgs investigated by DTA - TG , XRD , and SEM. The results show that：（1 ） in a certain degree, more Al4SiC4 - Al4 O4 C forms with Al powder addition increasing; （2） the formed Al4SiC4 - Al4 O4 C two morphologies, narrwly, sheet atul block, atul their panicle sizes are. 5 - 15 n and 10 -20 p.m , respectively; （3） the A1 powder htition increase ha.s little effect on the grain shape and size of Al4SiC4 - Al4 O4 C： （4） ttw formed Al4O4C mainly distributes on ttw surfctce of the AluSiC4 grains with irregular shape atut partitle size below I p,m, and some of them bond together.