The Preparation, Characterization, and Surface Reactivity of New Amorphous Metals Prepared by Co-Condensation

共缩合新型非晶金属的制备、表征及表面反应活性

• 批准号: 8903135
• 负责人: David Cocke
• 金额: $ 25.42万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-01 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8903135&HistoricalAwards=false
• 关键词: Preparation; Characterization; Surface; Reactivity; New

Amorphous metals represent a novel class of materials which exhibit new bulk and surface properties. Many amorphous metals show higher catalytic activity and selectivity than their crystalline counterparts. The freedom from thermodynamic constraints permits use of the amorphous phase as precursor to other unique metastable phases. Co-condensation is a very versatile method for preparing new amorphous metals and other metastable alloys with unusual properties. The direct combination of this method with modern surface characterization and catalytic testing produces a powerful approach to attack the fundamental questions associated with the unique surface properties of amorphous metals. A unique facility which permits preparation, characterization, study of surface reactivity and catalytic testing of amorphous alloys without removing the sample from the pristine environment of the UHV chamber has been developed with State of Texas support. In this proposal they are requesting funds to use this approach to study the surface structure and chemistry of amorphous refractory alloys to provide an understanding of their surface reactivity and basic information needed to ultimately explain unusual catalytic and corrosion properties. This proposal brings together the unique experience of D. L. Cocke in studying alloy surface reactivity with that of D. G. Naugle in the study and preparation of bulk and thin film amorphous metals to attack fundamentally the technologically important surface properties of amorphous materials. They emphasize that the major facilities for this innovative proposal are already in place; consequently, the principal need is for longer term operational funds.

非晶金属是一类具有新的体积和表面特性的新型材料。许多非晶金属表现出比晶体金属更高的催化活性和选择性。不受热力学约束的自由允许使用非晶相作为其他独特亚稳相的前体。共冷凝是一种非常通用的方法，用于制备新的非晶金属和其他具有特殊性能的亚稳合金。这种方法与现代表面表征和催化测试的直接结合，产生了一种强大的方法来解决与非晶金属独特表面特性相关的基本问题。在德克萨斯州的支持下，开发了一种独特的设备，可以制备，表征，研究非晶合金的表面反应性和催化测试，而无需从特高压室的原始环境中移除样品。在这项提案中，他们正在申请资金，使用这种方法来研究非晶耐火合金的表面结构和化学，以提供对其表面反应性的理解，以及最终解释不寻常的催化和腐蚀特性所需的基本信息。本提案将d.l. Cocke在研究合金表面反应性方面的独特经验与d.g. Naugle在研究和制备大块和薄膜非晶金属方面的独特经验结合起来，从根本上研究非晶材料在技术上的重要表面特性。他们强调，这一创新建议的主要设施已经到位；因此，主要需要的是长期业务资金。