Elastic properties of 纬鈥?Fe₄N probed by nanoindentation and ab initio calculation

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• 作者：Tetsuya Takahashi^a ; ^{takahashi@mch.rwth-aachen.de} ; Jens Burghaus^b ; Denis Music^a ; Richard Dronskowski^b ; Jochen M. Schneider^a
• 关键词：Nitrides ; Thin films ; Nanoindentation ; Elastic properties ; Mechanical properties
• 刊名：Acta Materialia
• 出版年：2012
• 期刊代码：1_13596454
• 类别：ms
• 出版时间：March, 2012
• 卷：60
• 期：5
• 页码：2054-2060
• 文件大小：845 K

摘要

We studied the elastic properties of 纬鈥?Fe₄N experimentally and theoretically, as the difference between calculated and measured literature data is up to 31%. A phase-pure 纬鈥?Fe₄N thin film and a bulk-like sample were synthesized using a reactive magnetron sputtering technique and a two-step ammonolysis reaction, respectively. The elastic moduli were measured to be 157 卤 11 and 159 卤 17 GPa, respectively, by nanoindentation. For nanoindentation on bulk-like 纬鈥?Fe₄N, the correction of structural compliance was applied to remove the influence of the porosity as well as of mounting. These measured elastic moduli are consistent with the value of 162 GPa obtained from ab initio calculations.