In-Situ Raman Spectroscopy Investigation of Corrosion Behavior of SiC/SiCf Composite in High-temperature and High-pressure Water
摘 要
利用高温高压循环水腐蚀试验系统、原位观察高压釜以及拉曼光谱表征系统,针对SiC/SiCf复合材料开展了腐蚀试验以及原位拉曼光谱测量。水化学介质为含1 200 mg/L H3BO3和2 mg/L LiOH的混合水溶液。试验分为未控氧条件(O2≈2 688 μg/L)和控氧条件(O2≈5 μg/L)。结果表明:在500、590、715、785、805、870、915、960 cm-1附近位置出现拉曼光谱峰,分别来自于β-SiC基体及其表面生成的SiC<i>xO<i>y、SiO2、Si(OH)4等。未控氧条件下,表面氧化膜易转变成可溶于水的Si(OH)4,保护性差。控氧条件下,氧化膜可保持较好的稳定性,SiO2向Si(OH)4的转变得到有效抑制,提高了SiC/SiCf复合材料的耐蚀性。
Abstract
Corrosion test and in-situ Raman spectroscopy measurement for SiC/SiCf composite were carried out using the established high temperature and high pressure circulating water corrosion test system, in-situ observation autoclave and Raman spectroscopy characterization system. The corrosion test environment was an aqueous solution containing 1 200 mg/L H3BO3 + 2 mg/L LiOH. Two series of corrosion experiments were conducted: in one experiment, the oxygen content in solution was not controlled (oxygen content ≈ 2 688 μg/L); in the other experiment, the oxygen content in solution was controlled (oxygen content≈5 μg/L). The results show that the Raman peaks were located near 500、590、715、785、805、870、915、960 cm-1, corresponding to β-SiC matrix and its surface oxide films SiCxOy, SiO2, Si(OH)4 etc., respectively. In the oxygen-saturated solution, surface films were prone to become Si(OH)4, which were not protective. In the oxygen-controlled solution, surface films were stable, and the transformation from SiO2 to Si(OH)4 were retarded. Therefore, the corrosion resistance of SiC/SiCf composite was improved.
中图分类号 TG174 DOI 10.11973/fsyfh-202011005
所属栏目 试验研究
基金项目 国家电力投资集团有限公司资助项目(SPIC(2017)06-41-573)
收稿日期 2020/6/10
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: WANG Feng,LI Huailin,CAO Xinyuan,LAN Xueying. In-Situ Raman Spectroscopy Investigation of Corrosion Behavior of SiC/SiCf Composite in High-temperature and High-pressure Water[J]. Corrosion & Protection, 2020, 41(11): 33
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】刘荣正,刘马林,邵友林,等. 碳化硅材料在核燃料元件中的应用[J]. 材料导报,2015,29(1):1-5.
【2】周新贵,王洪磊,赵爽. 核用SiCf/SiC复合材料研究进展[J]. 现代技术陶瓷,2016,37(3):151-167.
【3】YANG H,LI X Q,LIU C X,et al. Hydrothermal corrosion behavior of SiCf/SiC composites candidate for PWR accident tolerant fuel cladding[J]. Ceramics International,2018,44:22865-22873.
【4】KIM W J,HWANG H S,PARK J Y,et al. Corrosion behaviors of sintered and chemically vapor deposited silicon carbide ceramics in water at 360℃[J]. Journal of Materials Science Letters,2003,22:581-584.
【2】周新贵,王洪磊,赵爽. 核用SiCf/SiC复合材料研究进展[J]. 现代技术陶瓷,2016,37(3):151-167.
【3】YANG H,LI X Q,LIU C X,et al. Hydrothermal corrosion behavior of SiCf/SiC composites candidate for PWR accident tolerant fuel cladding[J]. Ceramics International,2018,44:22865-22873.
【4】KIM W J,HWANG H S,PARK J Y,et al. Corrosion behaviors of sintered and chemically vapor deposited silicon carbide ceramics in water at 360℃[J]. Journal of Materials Science Letters,2003,22:581-584.
相关信息