Understanding Alloy Chemistry for Enhanced Environmental Resistance

了解合金化学以增强耐环境性

• 批准号: 1662817
• 负责人: Hojong Kim
• 金额: $ 33.34万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2017
• 资助国家: 美国
• 起止时间: 2017-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1662817&HistoricalAwards=false
• 关键词: Understanding; Alloy; Chemistry; Enhanced; Environmental

Materials used in technologies with aggressive chemical environments such as gas turbines, fuel cells, batteries, and solar thermal power plants are being pushed to their operation limits to meet market demands for higher power and efficiency at reduced emissions and operating costs. The continued development of next-generation technologies requires a fundamental understanding of how materials respond to extreme chemical environments, which will enable the design of high performance alloys. This award supports fundamental research to learn how the composition and structure of high performance alloys can be engineered to improve performance in these environments. The ultimate goal is to provide tools for the design of corrosion-resistant materials for aggressive chemical environments found in future sustainable technologies, such as heat transfer fluid for concentrated solar power systems, gas turbines, and molten carbonate fuel cells. The knowledge gained in this project has broad applicability across fields essential for the future of U.S. competitiveness, including electrochemical energy storage (batteries), materials synthesis, and corrosion-resistant coatings. The research will be incorporated into courses at the graduate and undergraduate level, and will enhance K-12 outreach programs directed at broadening participation in STEM.This research centers on understanding the impact of alloying elements in controlling (1) the degradation reactions at interfaces between the alloy and its chemical environment at elevated temperatures (650-950°C), (2) the structure and chemistry of the protective oxide layer, as well as (3) the thermodynamic and mass transport properties of alloys - critical factors in the formation of protective oxide layers. Based on a model Ni-Al system, the research team will determine the thermodynamic, mass transport properties, and interfacial degradation reactions of Ni-based alloys under the systematic control of alloy chemistry (Cr, Pt, and Hf) using electrochemical techniques. The researchers will test the hypothesis that alloying elements (Cr, Pt, and Hf) can enhance environmental resistance of the Ni-Al alloys by facilitating the formation of a protective oxide layer (Al2O3). The work will result in the creation of a database of thermodynamic, mass transport, and interfacial corrosion properties of multi-component alloys, as well as the experimental techniques for their measurement.

在具有侵略性化学环境的技术中使用的材料，例如燃气轮机，燃料电池，电池和太阳能热电厂，以其运营限制，以满足市场对降低排放和运营成本的更高功率和效率的需求。下一代技术的持续开发需要对材料对极端化学环境的反应方式有基本的了解，这将使高性能合金的设计。奖项支持基本研究，以了解如何设计高性能合金的组成和结构以提高这些环境的性能。最终目标是为在未来的可持续技术中发现的积极化学环境设计耐腐蚀材料的设计工具，例如用于浓缩太阳能系统，燃气轮机和熔融碳酸盐燃料电池的传热流体。该项目获得的知识在美国竞争​​力的未来至关重要的领域中具有广泛的适用性，包括电化学能源存储（电池），材料合成和耐腐蚀涂料。 The research will be incorporated into courses at the graduate and undergraduate level, and will enhance K-12 outreach programs directed at broadening participation in STEM.This research centers on understanding the impact of alloying elements in controlling (1) the degradation reactions at interfaces between the alloy and its chemical environment at elevated temperatures (650-950°C), (2) the structure and chemistry of the protected oxide layer, as well as （3）合金的热力学和质量传输特性 - 受保护氧化物层形成的关键因素。基于模型NI-AL系统，研究团队将使用电化学技术在合金化学（CR，PT和HF）系统控制下确定基于Ni的合金的热力学，质量传输特性和界面降解反应。研究人员将检验以下假设：合金元素（CR，PT和HF）可以通过支持受保护的氧化物层的形成（AL2O3）来增强NI-AL合金的环境抗性。这项工作将导致创建多组分合金的热力学，质量传输和界面腐蚀特性的数据库，以及用于测量的实验技术。

项目成果

Thermodynamic Properties of Sr–Sn Alloys via Emf Measurements and Thermal Analysis

• DOI: 10.1149/1945-7111/ab8de1
• 发表时间: 2020-04
• 期刊: Journal of The Electrochemical Society
• 影响因子: 3.9
• 作者: N. Smith;Jorge Paz Soldan-Palma;Yuran Kong;Zi-kui Liu;Hojong Kim

Influence of gaseous atmosphere on electrochemical behavior of nickel alloys in LiCl-KCl-Na2SO4 at 700 °C

• DOI: 10.1016/j.corsci.2018.05.039
• 发表时间: 2018-09
• 期刊: Corrosion Science
• 影响因子: 8.3
• 作者: Kuldeep Kumar;Jarrod Gesualdi;N. Smith;Hojong Kim

Thermodynamic properties of Ca–Pb electrodes determined by electromotive force measurements

• DOI: 10.1016/j.jpowsour.2020.227745
• 发表时间: 2020-03
• 期刊: Journal of Power Sources
• 影响因子: 9.2
• 作者: N. Smith;Nicole E. Orabona;Jorge Paz Soldan Palma;Yuran Kong;Cameron F. Blanchard;Hojong Kim

Electrochemical Separation of Alkaline-Earth Elements from Molten Salts Using Liquid Metal Electrodes

使用液态金属电极电化学分离熔盐中的碱土元素

• DOI: 10.1021/acssuschemeng.0c04249
• 发表时间: 2020
• 期刊: ACS sustainable chemistry engineering
• 作者: Nigl, Thomas P.;Lichtenstein, Timothy;Kong, Yuran;Kim, Hojong
• 通讯作者: Kim, Hojong