The outgassing rate of titanium-aluminium alloys

• Published in: Vacuum Vol. 43; no. 5; pp. 661 - 663
• Main Author: Edelmann, Christian
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford Elsevier Ltd 1992; Elsevier
• Subjects: Aluminum alloys; Exact sciences and technology; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Physics; Titanium alloys; Vacuum apparatus and techniques; Vacuum pumps; Vacuum technology; Vacuum degassing; Vacuum equipment; Titanium Alloys; Aluminium Manganese Titanium Alloys; Roughness; Experimental study; Surface conditions; Physicochemical properties; Vacuum treatment; Surface treatment; Aluminium Titanium Alloys
• ISSN: 0042-207X; 1879-2715
• DOI: 10.1016/0042-207X(92)90102-3

The outgassing rates of the Soviet titanium alloys WT 20 and OT 4-1 were measured with a throughput method. The construction of the all-glass uhv apparatus with mercury diffusion pumps is described in detail. After 1 h of pumping at a temperature of 573 K the specific outgassing rate of the alloy WT 20 is of the order of magnitude of 10 −6 Pa l s cm −2. The exact value depends essentially on the pretreatment and on the temperature. The alloy OT 4-1 has at 50°C a somewhat higher specific outgassing rate of about 4 × 10 −6 Pa l s cm −2. Both materials can be used for the construction of uhv devices.