功能材料
功能材料
공능재료
JOURNAL OF FUNCTIONAL MATERIALS
2014年
17期
17116-17119,17124
,共5页
3D-Cf/SiC 复合材料%抗高温氧化%结构设计%自愈合机理%CVD%粉末烧结技术
3D-Cf/SiC 複閤材料%抗高溫氧化%結構設計%自愈閤機理%CVD%粉末燒結技術
3D-Cf/SiC 복합재료%항고온양화%결구설계%자유합궤리%CVD%분말소결기술
3D-Cf/SiC composites%anti-high temperature oxidation%structure design%self-sealing mechanism%CVD%powder sintering technology
为了提高3D-Cf/SiC 复合材料耐高温氧化性能，采用CVD和粉末烧结技术相结合依次在其表面制成 CVD-SiC 粘接层-自愈合功能层-CVD-SiC 耐冲蚀层等抗高温氧化涂层。运用 TG、SEM 和 TEM等手段研究了自愈合机理。结果表明，抗高温氧化涂层自愈合机理主要是 B4 C 和 MoSi2等氧化增重形成在高温下可流动的玻璃相，玻璃相充填材料裂纹和空隙有效地阻碍氧气渗透。因而3D-Cf/SiC复合材料具有较好的耐高温氧化性能。
為瞭提高3D-Cf/SiC 複閤材料耐高溫氧化性能，採用CVD和粉末燒結技術相結閤依次在其錶麵製成 CVD-SiC 粘接層-自愈閤功能層-CVD-SiC 耐遲蝕層等抗高溫氧化塗層。運用 TG、SEM 和 TEM等手段研究瞭自愈閤機理。結果錶明，抗高溫氧化塗層自愈閤機理主要是 B4 C 和 MoSi2等氧化增重形成在高溫下可流動的玻璃相，玻璃相充填材料裂紋和空隙有效地阻礙氧氣滲透。因而3D-Cf/SiC複閤材料具有較好的耐高溫氧化性能。
위료제고3D-Cf/SiC 복합재료내고온양화성능，채용CVD화분말소결기술상결합의차재기표면제성 CVD-SiC 점접층-자유합공능층-CVD-SiC 내충식층등항고온양화도층。운용 TG、SEM 화 TEM등수단연구료자유합궤리。결과표명，항고온양화도층자유합궤리주요시 B4 C 화 MoSi2등양화증중형성재고온하가류동적파리상，파리상충전재료렬문화공극유효지조애양기삼투。인이3D-Cf/SiC복합재료구유교호적내고온양화성능。
In order to increase anti-high temperature oxidation properties of 3D-Cf/SiC composites,oxidation re-sistant coatings,including a chemical vapor deposition (CVD)SiC bonding layer,a self-sealing active layer and a CVD-SiC erosion resistant layer,were prepared on carbon fiber reinforced silicon carbide (3D-Cf/SiC)com-posites by CVD and powder sintering technology.TG,SEM and TEM were used to research self-sealing mecha-nism of the coating.The results show that the self-healing mechanism of the coating was mainly that flowing glass phases oxidized of B4 C and MoSi2 fill in material cracks and pores,and block off the passage of oxygen at high temperature.So 3D-Cf/SiC composites have good high temperature oxidation resistance properties.
