Development of Joining Method for Zircaloy and SiC/SiC Composite Tubes by Using Fiber Laser
Development of Joining Method for Zircaloy and SiC/SiC Composite Tubes by Using Fiber Laser
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光纤激光锆合金与SiC/SiC复合管连接方法的开发
DOI：
10.1002/9781119234531.ch16
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
A. Kohyama
中科院分区：
文献类型：
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作者：
H. Serizawa;N. Asakura;Joon;H. Kishimoto;A. Kohyama
在轻水反应堆燃料包壳方面，SiC/SiC复合材料具有许多优越性，有望取代锆合金，这就需要发展SiC/SiC复合材料包壳端盖密封。在这项研究中，作为一种可能的设计，光纤激光焊接之间的SiC/SiC复合材料和锆合金管连接的适用性进行了检查的基础上，填缝方法。作为两个管的装配方法，对锆合金管的内表面和SiC/SiC复合材料的外表面进行了两种类型的切削，即平面切削和螺旋切削。将激光束周向地施加到锆合金管的外表面。无论何种切割方式，均成功地实现了两管的机械铆接，但SiC/SiC复合材料包覆端盖的气密性不足。然而，螺纹切削似乎是优选的，因为锆合金的螺纹被激光照射熔化并且其形状改变，使得锆合金部分地粘附到SiC/SiC复合材料。结果表明，激光周向辐照对锆合金和SiC/SiC复合材料管材的螺旋切割铆接接头具有良好的应用前景。
As for the fuel cladding in the light-water reactor, silicon fiber reinforced silicon carbide composite (SiC/SiC composite) is expected as a potential replacement of Zircaloy due to its many superiorities, where it is necessary to develop the end-cap seal of SiC/SiC composite cladding. In this research, as one possible design, the applicability of fiber laser welding for joining between SiC/SiC composite and Zircaloy tubes was examined based on the caulking method. As the methods for fitting two tubes, two types of cutting, which were flat and screw cuttings, were conducted for the inner face of Zircaloy tube and the outer surface of SiC/SiC composite. The laser beam irradiation was circumferentially applied to the outer surface of Zircaloy tube. Regardless of types of cutting, the mechanical caulking joint of two tubes was successfully produced, but the airtightness was insufficient for the end-caps of SiC/SiC composite cladding. However, the screw cutting seems to be preferable because the screw threads of Zircaloy was melted by the laser irradiation and its shape changed so that Zircaloy adhered to SiC/SiC composite partially. Namely, it can be concluded that the circumferential laser irradiation would have a good potential for producing the caulking joint of Zircaloy and SiC/SiC composite tubes with the screw cutting.