کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1483236 | 1510489 | 2010 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Elastic properties and surface damage resistance of nitrogen-rich (Ca,Sr)–Si–O–N glasses Elastic properties and surface damage resistance of nitrogen-rich (Ca,Sr)–Si–O–N glasses](/preview/png/1483236.png)
Ca and Sr-based oxynitride glasses with very high nitrogen content have been synthesized using metal hydrides as primary precursors. Values of Young's modulus, shear modulus, bulk modulus and Poisson's ratio were determined by means of ultrasonic echography. Vickers micro-indentation has been used to characterize hardness and indentation fracture toughness behaviour. Elastic moduli were found to increase linearly with nitrogen content, with the highest value of Young's modulus at 135 GPa, for a Ca-glass with 58 e/o of nitrogen. The Sr-glasses exhibit lower elastic moduli than Ca glasses. Poisson's ratio, hardness, indentation fracture toughness, crack initiation load and surface damage resistance were found to increase with increasing nitrogen content for both glass series.
Journal: Journal of Non-Crystalline Solids - Volume 356, Issues 41–42, 1 September 2010, Pages 2120–2126