Frontiers of corrosion science

腐蚀科学前沿

• 批准号: 313209-2009
• 负责人: Newman, Roger
• 金额: $ 4.01万
• 依托单位: University of Toronto
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=514938
• 关键词: Frontiers; corrosion; science

Stress corrosion cracking (SCC) is the slow growth of cracks under the simultaneous influence of a tensile stress and a reactive environment. Usually the term is applied to metals, although glasses and ceramics can also show related phenomena. SCC has enormous engineering importance in a wide range of industries. In metals, which are the subject of this proposal, there have always been fierce arguments as to the nanoscale events that occur at the tips of such cracks. Recently, new tools and theories have evolved that can aspire to observe and model such events. However they have been used mainly to study complex engineering alloys in difficult environments such as high-temperature water, or in the case of certain atomistic modelling schemes, materials that are more like brittle solids than metals. In this project, we will revert to easily studied model alloy systems and apply a range of modern approaches to them. This should greatly advance the foundations of the subject.

应力腐蚀开裂（SCC）是在拉应力和反应环境的同时影响下裂纹的缓慢生长。通常该术语适用于金属，尽管玻璃和陶瓷也可以表现出相关现象。 SCC 在众多行业中具有巨大的工程重要性。在作为该提案主题的金属中，对于此类裂纹尖端发生的纳米级事件一直存在激烈的争论。最近，新的工具和理论不断发展，能够对此类事件进行观察和建模。然而，它们主要用于研究高温水等困难环境中的复杂工程合金，或者在某些原子建模方案的情况下，研究比金属更像脆性固体的材料。在这个项目中，我们将回归易于研究的模型合金系统，并对它们应用一系列现代方法。这应该极大地推进该学科的基础。