英语高考作文
中国科学技术大学
硕士学位论文
火影忍者英文版漫画耐高温材料与液态锂铅相容性初步实验研究
姓名：***
申请学位级别：硕士
专业：核能科学与工程
指导教师：***
2011-04-19
摘要
聚变能是一种“清洁安全、永久性”能源，它的实现将一劳永逸地解决人类的能源需求，大幅度地减少环境污染。
托福辅导然而材料问题是实现聚变能走向应用的“瓶颈”问题之一。SiC f/SiC复合材料、W、Mo由于其良好的物理性能，成为未来高温聚变堆各重要部件（如包层、偏滤器等）很有潜力的候选结构材料和功能材料。同时，FDS团队根据液态包层相关技术发展需求，进行了系列液态锂铅回路设计与建造，为了适应高温锂铅回路的发展，亟需寻找适用于高温下的回路管道材料。310S不锈钢由于其优秀的耐高温、抗高温氧化性能，将其作为高温锂铅回路候选的结构材料。由于上述耐高温材料均与高温液态锂铅直接接触，因此研究它们与液态锂铅的相容性就变得至关重要。
本论文利用FDS团队自主研制的高纯液态锂铅合金和高温静态锂铅腐蚀实验装置DRAGON-ST系列开展了SiC陶瓷及SiC f/SiC复合材料，W、Mo，以及310S不锈钢在700℃~1000℃液态锂铅中不同腐蚀时间的腐蚀实验。研究结果表明：1）SiC及SiC f/SiC复合材料中游离Si、α-SiC、无定形SiC在高温下易于溶解于液态锂铅，导致其与高温液态锂铅相容性较差；2）W、Mo在高温液态锂铅中发生均匀腐蚀，其中W在700℃液态锂铅中，经过500小时腐蚀的样品的腐蚀深度为0.38mm·a-1，经过1000小时腐蚀实验的样品的腐蚀深度为0.16mm·a-1，腐蚀速度随着时间增长减慢，主要原因可能是W在锂铅中的溶解度渐渐趋于饱和。Mo在700℃液态锂铅中经过500小时腐蚀实验的腐蚀深度为1.96mm·a-1，在1000℃经过200小时腐蚀实验的腐蚀深度为2.575mm·a-1，随温度越高，腐蚀变得越剧烈；3）310S不锈钢在高温液态锂铅中发生较为严重的腐蚀，在700℃~1000℃液态锂铅环境难以长时间作为高温液态锂铅实验回路的结构材料。关键词：液态锂铅合金 SiC W Mo 310S不锈钢相容性
喜欢的英文*本论文工作得到国家自然科学基金项目（50871108、1775135、10676166、51076166），国家磁约束聚变能研究专项资助（2009GB104005），中国科技大学研究生创新教育计划基金等项目的支持。
ABSTRACT
corporation是什么意思Fusion Energy is a kind of "clean, safe and permanent" energy. Its realization will resolve human energy needs once and for all, and substantially reduce environmental pollution.
Issue of materials is one of the "bottleneck" problems of the realization of application of fusion energy. SiC f / SiC composites, W and Mo are very potential candidates of structural materials and functional materials of important components (such as blanket, first wall, divertor, etc.) of the high-temperature fusion reactors becau of their excellent physical properties. At the same time, bad on the needs of related technology development of liquid blankets, FDS team has designed and construted ries of liquid lithium-lead (LiPb) loops. In order to meet the development of high-temperature LiPb loop, it is in a hurry to find applicative structural materials for the pipes of the loop. 310S stainless steel is choiced as the candidate structural material of the high-temperature LiPb loop becau of its excellent high temperature property and high temperature oxidation resistance pr
operty. Becau all the high temperature resisitant materials are in direct contact with the liquid LiPb, study the compatibility of them with liquid LiPb under different conditions becomes critical.
电话机的英文In this thesis, compatibility experiments of SiC ceramic and SiC f/SiC composites, W, Mo, and 310S stainless steel with LiPb at 700~1000 fo
点的构成℃℃r different exposing time were carried out in static LiPb corrosion test device of DRAGON-ST. Both DRAGON-ST and high purity LiPb were developed independently by FDS team. The results showed that: 1) The free Si, α-SiC, amorphous SiC of domestic SiC and SiC f/SiC composites dissolved in LiPb at high temperature which lead poor
℃; 2)
℃Uniform corrosion of W compatibility of them in liquid LiPb at 700~1000
and Mo occurred in the high temperature liquid LiPb. The corrosion depth of W at 700℃ for 500h is 0.38 mm • a-1, and that for 1000h is 0.16 mm • a-1. The corrosion rate reduced with time, probably mainly due to the solubility of W in the LiPb saturated gradually. The corrosion depth of Mo at 700℃ for 500h is 1.96 mm • a-1, and that at 1000℃ for 200h is 2.575 mm • a-1. The higher the temperatur
e, more rious the corrosion; 3) the compatibility of 310 stainless steel with liquid LiPb is poor. It can not be choiced as structure material of the high temperature liquid LiPb experiment loop at the temperature of working environment up to 700℃ for long
topdog
time.
improve
Key Words: liquid LiPb, SiC, refractory metals, 310S steel, compatibility
* This work was supported by the China National Natural Science Foundations ( grant Nos. 50871108, 1775135, 10676166 and 51076166 ), the National Basic Rearch of China with grant No. 2009GB104005, Innovative Eduction Program of Graduate of University of Science and Technology.
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