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Development Of Protective Coatings For Tantalum-Base Alloys

Report Number: ASD TR 61-676
Author: Klopp, William D.
Author: Powell, Carroll F.
Corporate Author: Battelle Memorial Inst Columbus Ohio
Laboratory: Directorate of Materials and Processes
Date of Publication: 1962-03
Pages: 106
Contract: AF 33(616)-7184
Project: 7312
Task: 73120
AD Number: AD0276269

This program was started with a survey to determine potential coating materials for protecting tantalum alloys from oxidation and contamination at high temperatures. This survey and initial coating studies resulted in major emphasis being directed toward silicide-based coatings. Straight silicide coatings and modifications with aluminum, boron, chromium, manganese, molybdenum, titanium, and vanadium were applied to tantalum, Ta-10W, Ta-10Hf-5W, and Ta-30Cb-5V by pack-cementation techniques. These coated materials were evaluated primarily by statis, cyclic, and defect oxidation studies in the temperature range of 1200 to 2700 F. Less extensive studies were conducted on tantalum coated with aluminum, chromium, hafnium, titanium, zinc, and Al2O3.

Lockheed Martin Missiles & Fire Control
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