Codeposition of Metals for Oxidation Protection Above 2200 Degrees Centigrade

2200 摄氏度以上的金属共沉积氧化防护

• 批准号: 8860459
• 负责人: John Harding
• 金额: $ 4.98万
• 依托单位: ULTRAMET, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-01-01 至 1989-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8860459&HistoricalAwards=false
• 关键词: Codeposition; Metals; Oxidation; Protection; Above

Platinum group metal (PGM) coatings have been shown to provide oxidation protection for rocket engine components operating to 2200 C. Platinum, rhodium and iridium form compounds with zirconium and hafnium. These compounds are of great interest because they are very stable, with melting points higher than those of either constituent. Furthermore, zirconium and hafnium can be formed by chemical vapor deposition (CVD) similar to processes employed for depositing platinum group metals. Codeposition is thus possible, which will produce coatings of uniform constituency. In this Phase I program, Ultramet proposes to demonstrate the feasibility of forming compound coatings in this manner and test for oxidation resistance to 2400 C. The ability to reduce the percentage of PGM Constituents, and use thinner coatings, will serve to conserve these scarce metals.

铂族金属（PGM）涂层已被证明可以为运行到2200摄氏度的火箭发动机部件提供氧化保护。铂、铑和铱与锆和铪形成化合物。这些化合物非常有趣，因为它们非常稳定，熔点高于任何一种成分。此外，锆和铪可以通过化学气相沉积（CVD）形成，类似于沉积铂族金属的过程。因此，共沉积是可能的，这将产生均匀成分的涂层。在这个第一阶段的项目中，Ultramet计划证明以这种方式形成复合涂层的可行性，并测试其在2400℃下的抗氧化性。减少PGM成分百分比的能力，以及使用更薄的涂层，将有助于保护这些稀有金属。