| 摘要 |
<p>1451976 Soldering metals; carbides and oxides PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 3 Jan 1974 [11 Jan 1973] 00307/74 Headings B3R and B3V [Also in Division H1] In a method soldering together two articles each consisting of a high melting point (above 2400‹ C.) metal, e.g. W, Ta, Mo, Re, Os, Tr, Nb, or a high melting point (above 2000‹ C.) metal carbide or oxide, e.g. tantalum carbide, tungsten carbide and aluminium oxide, or a combination of two or more of these materials, zirconium solder is placed between the articles and the assembly heated in a rare gas (Argon) atmosphere to at least solder wetting temperature (between 1,600-1,900‹ C.) and then heated (at a simlar temperature) in a nitrogen-containing atmosphere (e.g. N 2 + a rare gas) after which it is cooled. At least the external surface layer of the solder in the completed joint consists of zirconium nitride. The assembly may be an electrode for a highpressure gas discharge lamp jointed to a current supply conductor, see Division H1.</p> |
