摘要:
A niobium and titanium based alloy having a density less than 6.5 and possessing a high resistance to oxidation at high temperatures in the region of 900.degree. C. has a chemical composition comprising, in atomic percentages:more than 24% Nbfrom 30 to 48% Tifrom 21 to 38% Aland possibly up to 8% of at least one of Cr, Mo, V and Zr.
摘要:
A method for the assembly and connection of bodies, massive parts or powder grains, of alloys comprising at least 50% of nickel, cobalt or iron, comprises a preliminary operation of deposition at the interface of the said bodies of a product of the type MBF.sub.x, x being equal to 3 or 4, M designating a radical of the type NH.sub.4 giving off when hot a gaseous component such as NH.sub.3 or a metallic element and a sequence of treatment of cleaning/activation by passage of the coated body at a temperature in excess of the temperature of sublimation of the said product.