| 摘要 |
<p>1,132,347. Brazing. SYVANIA ELECTRIC PRODUCTS Inc. 10 Dec., 1965 [11 Dec., 1964], No. 52587/65. Heading B3R. [Also in Division H1] In bonding the refractory metal wire helix 43 to the refractory metal side members 33 in a strap-frame electrode 41 a layer of particulate iron 47 is applied around the areas of contact of the helix with the side members and the assembly is heated to a temperature no greater than 900‹ C. to cause the interdiffusion of the iron into the helix and side members and the formation of diffusion bands. A frame having molybdenum side members 33 and molybdenum cross members 35 is wrapped with a helix of tungsten wire and a slurry of iron particles in an organic binder is painted on the areas of contact 45. The assembly is then heated to 800‹ C. for 10 minutes in an atmosphere of dissociated ammonia so that the binder is volatilized and the iron particles sinter and diffuse into the helix and side members. The side members and helix may be of columbium, platinum, ruthenium or alloys thereof.</p> |
