Salt-fog corrosion behavior of C/SiC and its effect on ablation resistance

doi:10.1016/j.jmst.2019.04.037

Abstract

Abstract:

Carbon fiber-reinforced silicon carbide (C/SiC) composites are significantly important candidates for thermal protection materials. The corrosion mechanism of C/SiC composite materials is the basis of their optimization and application. In this study, structural evolution of C/SiC composites fabricated by chemical vapor infiltration was investigated in the salt-fog storage environment. Furthermore, the effect of salt-fog on their ablation behaviors under oxyacetylene flame environment was studied. The ablation morphologies and corrosion mechanisms of C/SiC composites were analyzed and discussed. The results indicated that silica layer with size of c.a. 20 nm was formed on the surface of composite. The extent of corrosion in salt fog was limited, and it had little effect on the ablation behavior of the C/SiC composites, as well on the tensile strength and bending strength.

Key words: Ceramic matrix composites, Salt fog corrosion, Oxidation, Ablation property

Su Cheng, Xing Zhao, Guang Yang, Yiguang Wang. Salt-fog corrosion behavior of C/SiC and its effect on ablation resistance[J]. J. Mater. Sci. Technol., 2019, 35(12): 2772-2777.

Figures/Tables 12

Fig. 1. Schematic diagram of fabrication process and microstructure of C/SiC composites.

Fig. 2. Macroscopic appearance of C/SiC composite craft wafer: before (a) before salt corrosion, (b) after salt corrosion.

Fig. 3. SEM and EDS images of C/SiC composite after salt fog corrosion.

Fig. 4. 3D topography of C/SiC composite: (a) before salt corrosion, (b) after salt corrosion.

Fig. 5. XRD patterns of C/SiC composite before and after corrosion.

Fig. 6. (a) XPS results of C/SiC composite before and after salt corrosion, (b) The bond energy of silicon.

Fig. 7. Etching results of XPS on the surface of C/SiC composite.

Fig. 8. Binding energy of C/SiC composite before and after corrosion.

Fig. 9. Schematic diagram of the process of corrosion of C/SiC composites.

Table 1 Ablation rate of 3D needled C/SiC composites before and after corrosion.

Sample	Density (g∙cm-3)	Linear ablation rate (mm∙s-1)	Mass ablation rate (g∙s-1)
C/SiC sample	2.13	0.037?±?0.002	0.0084?±?0.0022
After Corrosion sample	2.17	0.020?±?0.002	0.0052?±?0.0011

Fig. 10. Surface morphologies of different ablation regions for C/SiC samples before and after salt spray corrosion: (a,b) central ablation region before and after salt spray corrosion; (c,d) transition ablation region before and after salt spray corrosion; (e,f) brim ablation region before and after salt spray corrosion.

Fig. 11. Mechanical test result of samples before and after corrosion.

[1]	Seung Woo Lee, Bongho Lee, Chaekyung Baik, Tae-Yang Kim, Chanho Pak. Multifunctional Ir-Ru alloy catalysts for reversal-tolerant anodes of polymer electrolyte membrane fuel cells [J]. J. Mater. Sci. Technol., 2021, 60(0): 105-112.
[2]	Haoxuan Wang, Shouye Wang, Yejie Cao, Wen Liu, Yiguang Wang. Oxidation behaviors of (Hf_0.25Zr_0.25Ta_0.25Nb_0.25)C and (Hf_0.25Zr_0.25Ta_0.25Nb_0.25)C-SiC at 1300-1500 °C [J]. J. Mater. Sci. Technol., 2021, 60(0): 147-155.
[3]	Dan Zhang, Qi Han, Kun Yu, Xiaopeng Lu, Ying Liu, Ze Lu, Qiang Wang. Antibacterial activities against Porphyromonas gingivalis and biological characteristics of copper-bearing PEO coatings on magnesium [J]. J. Mater. Sci. Technol., 2021, 61(0): 33-45.
[4]	Kunming Pan, Yanping Yang, Shizhong Wei, Honghui Wu, Zhili Dong, Yuan Wu, Shuize Wang, Laiqi Zhang, Junping Lin, Xinping Mao. Oxidation behavior of Mo-Si-B alloys at medium-to-high temperatures [J]. J. Mater. Sci. Technol., 2021, 60(0): 113-127.
[5]	Weiwei Xiao, Na Ni, Xiaohui Fan, Xiaofeng Zhao, Yingzheng Liu, Ping Xiao. Ambient flash sintering of reduced graphene oxide/zirconia composites: Role of reduced graphene oxide [J]. J. Mater. Sci. Technol., 2021, 60(0): 70-76.
[6]	H. Chen, A. Rushworth. Effects of oxide stringers on the β-phase depletion behaviour in thermally sprayed CoNiCrAlY coatings during isothermal oxidation [J]. J. Mater. Sci. Technol., 2020, 45(0): 108-116.
[7]	Yifei Xu, Lars P.H. Jeurgens, Peter Schützendübe, Shengli Zhu, Yuan Huang, Yongchang Liu, Zumin Wang. Effect of atomic structure on preferential oxidation of alloys: amorphous versus crystalline Cu-Zr [J]. J. Mater. Sci. Technol., 2020, 40(0): 128-134.
[8]	Qi Wang, Wen Shi, Bo Zhu, Dang Sheng Su. An effective and green H₂O₂/H₂O/O₃ oxidation method for carbon nanotube to reinforce epoxy resin [J]. J. Mater. Sci. Technol., 2020, 40(0): 24-30.
[9]	Lanlan Yang, Minghui Chen, Jinlong Wang, Yanxin Qiao, Pingyi Guo, Shenglong Zhu, Fuhui Wang. Microstructure and composition evolution of a single-crystal superalloy caused by elements interdiffusion with an overlay NiCrAlY coating on oxidation [J]. J. Mater. Sci. Technol., 2020, 45(0): 49-58.
[10]	Ting Wu, Carsten Blawert, Mikhail L.Zheludkevich. Influence of secondary phases of AlSi9Cu3 alloy on the plasma electrolytic oxidation coating formation process [J]. J. Mater. Sci. Technol., 2020, 50(0): 75-85.
[11]	Dongjun Wang, Hao Li, Wei Zheng. Oxidation behaviors of TA15 titanium alloy and TiBw reinforced TA15 matrix composites prepared by spark plasma sintering [J]. J. Mater. Sci. Technol., 2020, 37(0): 46-54.
[12]	Varma S.K., Sanchez Francelia, Moncayo Sabastian, Ramana C.V.. Static and cyclic oxidation of Nb-Cr-V-W-Ta high entropy alloy in air from 600 to 1400 °C [J]. J. Mater. Sci. Technol., 2020, 38(0): 189-196.
[13]	Fangqiang Ning, Jibo Tan, Xinqiang Wu. Effects of 405 stainless steel on crevice corrosion behavior of Alloy 690 in high-temperature pure water [J]. J. Mater. Sci. Technol., 2020, 47(0): 76-87.
[14]	Changjin Xu, Yutong Wu, Song Li, Jun Zhou, Jing Chen, Min Jiang, Hongda Zhao, Gaowu Qin. Engineering the epitaxial interface of Pt-CeO₂ by surface redox reaction guided nucleation for low temperature CO oxidation [J]. J. Mater. Sci. Technol., 2020, 40(0): 39-46.
[15]	H. Liu, M.M. Xu, S. Li, Z.B. Bao, S.L. Zhu, F.H. Wang. Improving cyclic oxidation resistance of Ni₃Al-based single crystal superalloy with low-diffusion platinum-modified aluminide coating [J]. J. Mater. Sci. Technol., 2020, 54(0): 132-143.