Abstract: The present disclosure relates to a high voltage vacuum tube including: a vacuum tube envelope comprising an interior; an anode assembly disposed within the interior of the vacuum tube envelope; and a cathode assembly disposed within interior of the vacuum tube envelope that emits an electrode beam to strike a target surface of the anode assembly and form electromagnetic radiation. The high voltage vacuum tube includes a braze assembly, said braze assembly comprising a first component and a second component joined together by a first braze joint, said first braze joint comprising a composition including no more than 18.0 wt % in total of one of more precious metals selected from Au, Pd and Pt, where at least a portion of the braze joint is exposed to the interior of the vacuum tube envelope.

Abstract: The present disclosure relates to a high voltage vacuum tube including: a vacuum tube envelope comprising an interior; an anode assembly disposed within the interior of the vacuum tube envelope; and a cathode assembly disposed within interior of the vacuum tube envelope that emits an electrode beam to strike a target surface of the anode assembly and form electromagnetic radiation. The high voltage vacuum tube includes a braze assembly, said braze assembly comprising a first component and a second component joined together by a first braze joint, said first braze joint comprising a composition including no more than 18.0 wt % in total of one of more precious metals selected from Au, Pd and Pt, where at least a portion of the braze joint is exposed to the interior of the vacuum tube envelope.

Abstract: The present invention relates to a braze alloy composition including in weight %: 80 to 97.98 Cu; 2.0?Ge?9.5; 0.02<B?1.25; and incidental impurities. The braze alloy composition includes no more than 0.4 wt % Sn.