| 摘要 |
PROBLEM TO BE SOLVED: To prevent a brazing material from flowing into an article opening and also prevent deformation of the opening in a brazing process. SOLUTION: In a brazing process, a shim 88 which is formed from a mica substance mixed with a heat resistant binder is compressed and fasteningly engaged with an opening 64 of the article for supporting walls 78 and 82 of the opening 64. Since the shim 88 maintains rigidity and strength after being heated at high temperature, brazing can be carried out at high temperature and deformation of the opening 64 can be also prevented. Furthermore, since the shim acts as a blocking material, the unrequired brazing material 84 is prevented from flowing into the opening 64, so that the shim 88 is not adhered to an adjacent structure by the brazing material 84. Additionally, since brittleness of the shim 88 is increased when heated at high temperature, the shim can be easily removed.
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