针对C/SiC低温氧化易失效的不足,研究了CVI B-C基体改性2D C/SiC在700℃湿氧中100MPa下加载至60h的氧化行为,利用SEM和TEM观察了改性材料不同服役时间的微结构特征,揭示了演变规律.研究表明,CVI B-C基体改性使C/SiC低温抗氧化能力显著提升.基体裂纹及其在应力加载下的开裂均为氧化气体提供进入通道,而后可被B-C氧化产物B2O3封填,抑制内部C消耗.CVI B-C与其氧化产物一同参与缺陷愈合.在60h内,B-C改性层愈合能力尚未完全发挥,可服役更长时间.
参考文献
[1] | Ohnabe H,Masaki S,Onozuka M,et al.Potential applications of ceramic matrix composites to aero-engine components.Compos.Part A-Appl.S,1999,30(4):489-496. |
[2] | 张立同,成来飞.连续纤维增韧陶瓷基复合材料可持续发展战略探讨.复合材料学报,2007,2(24):1-6. |
[3] | 张立同,成来飞,徐永东.新型碳化硅陶瓷基复合材料的研究进展.航空制造技术,2003(1):23-32. |
[4] | Cheng L F,Xu Y D,Zhang L T,et al.Oxidation and defect control of CVD SiC coating on three-dimensional C/SiC composites.Carbon,2002,40(12):2229-2234. |
[5] | Yim X W,Cheng L F,Zhang L T,et al.Microstructure and oxidation resistence of carbon/silicon carbide composites infiltrated with chromium silicide.Mat.Sci.Eng.A-Struct.,2000,29(1/2):89-94. |
[6] | Lamouroox F,Bertrand S,Pailler R,et al.Oxidation-resistant carbon-fiber-reinforced ceramic-matrix composites.Compos.Sci.Technol.,1999,59(7):1073-1085. |
[7] | Steyer T E,Zok F W,Walls D P.Stress rupture of an enhanced Ni-calon/silicon carbide composite at intermediate temperature.J.Am.Ceram.Soc.,2005,81(8):2140-2146. |
[8] | Viricelle J P,Goursat P,Bahloul H D.Oxidation behaviour of a multi-layer ceramic-matrix composite(SiC)f/C/(Si-B-C)m,Compos.Sci.Technol.,2001,61(4):607-614. |
[9] | Werheit H,Rotter H W,Meyer F D,et al.FT-Raman spectra of isotope-enriched boron carbide.J.Solid State Chem.,2004,177(2):569-574. |
[10] | Liu Y S,Zhang L T,Cheng L F,et al.Preparation and oxidation resistance of 2D C/SiC composites modified by partial boron carbide serf-sealing matrix.Mat.Sci.Eng.A-Struct.,2008,495(1/2):430-436. |
[11] | Jacobson N S,Farmer S,Moore A,et al.High temperature oxidation of boron nitride.Part Ⅰ.Monolithic boron nitride.J.Am.Ceram.Soc.,1999,82(2):393-398. |
[12] | Jacobson N S,Morscher G N,Bryant D R,et al.High temperature oxidation of boron nitride.Part Ⅱ.BN layers in composites.J.Am.Ceram.Soc.,1999,82(6):1473-1482. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%