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演講主題:由金屬原子之功函數探索材料之耐磨耗特性
演講者:李東陽
組別:
演講時間:2019-06-10 02:40
演講地點:延平技術大樓 B1演講廳
詳細說明:

Exploring application of electron work function in material analysis and design

D.Y. Li

Department of Chemical and Materials Engineering

University of Alberta, Edmonton, Alberta, Canada T6G 1H9

 

Abstract: With rapid advance in material technology, material design has been required to rely on more fundamental principles. Intrinsic properties of materials are largely governed by their electron behaviour, which determines the atomic bond strength and system’s stability. Significant effort has long been made to correlate properties of materials to their electron state based on quantum mechanics. However, the quantum theories are complicated and unfeasible for material design, especially for structural materials which consist of various phases and imperfections. Thus, it is highly wished to have simple but fundamental parameters, which reflect the electron behaviour of materials, for material analysis and design. In this talk, electron work function, which is the minimum energy to move electrons at Fermi level inside a metal to its surface, is demonstrated to be a promising indicative parameter to characterize materials and provide clues for material design and modification. Correlations between EWF and mechanical, electrochemical and tribological properties of materials will be demonstrated and discussed.

 

探索電子功函數在材料分析與設計中的應用

摘要:隨著材料技術的快速發展,材料設計需要依賴更基本的原理。材料的固有特性在很大程度上取決於它們的電子行為,這決定了原子鍵強度和系統的穩定性。長期以來研究人员们一直致力于应用量子力學將材料的性質與它們的電子態相關聯。然而量子理論對於材料設計通常是複雜的,特別是對於由各種相和缺陷組成的結構材料。因此,非常希望可以找到能够反映材料電子行為的簡單但基本的參數,以用于材料分析和設計。本演講将显示電子功函數(將固體內部的費米能級電子移動到其表面的最小能量)是一个有前景的表徵材料並為材料設計和修改提供線索的指示导性參數.该讲座将以实例来展示電子功函數與材料的機械,電化學和摩擦學性質之間的相關性。

國立臺灣海洋大學機械與機電工程學系 National Taiwan Ocean University Department of Mechanical and Mechatronic Engineering
地址:基隆市中正區北寧路2號 電話:02-24622192 轉3200~3201 傳真:02-24620836 Email:mme@mail.ntou.edu.tw