| 摘要 |
A method of securing a window (12) of crumbly material in the end of a tube (10) so as to effectively prevent leakage during temperature cycling, first involving the step of selecting a window (12) having a small clearance when placed inside the end of the tube (10). Any contamination is removed from the periphery of the window (12), and then a thin metallic layer (22) that will accept nickel plate is vapor deposited around the periphery of the window (12). Subsequently, a hoop (26) of tensilly stressed nickel plate is applied over the thin metallic layer (22) after which the window (12) and tube (10) are sweated together by the application of suitable amounts of solder (24) and heat. Significantly, the hoop (26) of nickel serves to keep the window (12) in continuous compression, such that leakage between the window (12) and tube (10) is effectively prevented. |
