Anti-thermal behavior of materials. (1st July 2015)

• Record Type: Journal Article
• Authors: Cantwell, Patrick R.; Holm, Elizabeth A.; Harmer, Martin P.; Hoffmann, Michael J.
• Is Part Of: Scripta materialia. Volume 103(2015)
• Page Start: 1
• Page End: 5
• Publication Date: 2015-07-01
• Subjects: Arrhenius equation -- Activation energy -- Diffusion -- Grain growth -- Thermal properties; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.02.011
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Thermally activated processes such as diffusivity, grain growth, oxidation, and catalysis are often modeled using the Arrhenius equation, in which the steady-state process rate increases with increasing temperature, yielding a positive activation energy. However, in some systems, the process rate is constant or decreases with increasing temperature. Mechanistic explanations for many types of anti-thermal behavior are lacking. By learning how to control anti-thermal behavior, major advances are possible in fields ranging from catalysis to nanocrystalline alloys to high efficiency engines.