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Vacuum plasma etching of 1wt% La 2 O 3 doped tungsten alloy surfaces were carried out to refine the surface morphology for enhancing its bonding characteristics with copper for fusion reactor components. Three different gas compositions containing argon with zero, 14.3 and 25vol% hydrogen were used to carry out the plasma etching from 30 to 120s on the given samples. Mitutoyo surface...
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