| 摘要 |
An x-ray transmissive window assembly for use in metal framed x-ray tubes is formed of at least two layers of metal joined by explosion welding. An x-ray transmissive window, preferably comprising aluminum or an aluminum alloy, is joined to a transition layer, which is typically the same material as the x-ray tube vacuum vessel, to form the transmissive window assembly. The transmissive window is formed in the assembly by removing the transition layer material from the central region. A weld flange is prepared by removing the x-ray transmissive window material from the periphery of the assembly. The assembly is then welded into the x-ray tube vacuum vessel using traditional techniques. In another embodiment, a multi-layered window assembly comprises an x-ray transmissive window, a transition layer weldable to an x-ray tube vacuum vessel, and an intermediate layer that acts as a mask or aperture to attenuate peripheral radiation and clearly define the edges of the transmitted x-ray beam. The intermediate layer also acts as a diffusion barrier that prevents the formation of a brittle intermetallic layer between the transmissive window and transition layers during high temperature operation. Additionally, according to the present invention, an x-ray system comprising the above-described window assembly is disclosed.
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