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 ...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.展开更多
文摘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.
