کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7208288 | 1469091 | 2016 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface toughness of silicon nitride bioceramics: I, Raman spectroscopy-assisted micromechanics
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موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی پزشکی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Surface toughness of silicon nitride bioceramics: I, Raman spectroscopy-assisted micromechanics Surface toughness of silicon nitride bioceramics: I, Raman spectroscopy-assisted micromechanics](/preview/png/7208288.png)
چکیده انگلیسی
Indentation micro-fracture is revisited as a tool for evaluating the surface toughness of silicon nitride (Si3N4) bioceramics for artificial joint applications. Despite being unique and practical from an experimental perspective, a quantitative assessment of surface fracture toughness using this method is challenging. An improved method has been developed, consisting of coupling indentation with confocal (spatially resolved) Raman piezo-spectroscopy. Empowered by the Raman microprobe, the indentation micro-fracture method was found to be capable of providing reliable surface toughness measurements in silicon nitride biomaterials. In designing the microstructures of bioceramic bearing couples for improved tribological performance, surface toughness must be considered as a fundamentally different and distinct parameter from bulk toughness. The coupling of indention crack opening displacements (COD) with local stress field assessments by spectroscopy paves the way to reliably compare the structural properties of bioceramics and to quantitatively monitor their evolution during environmental exposure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Mechanical Behavior of Biomedical Materials - Volume 54, February 2016, Pages 328-345
Journal: Journal of the Mechanical Behavior of Biomedical Materials - Volume 54, February 2016, Pages 328-345
نویسندگان
Giuseppe Pezzotti, Yuto Enomoto, Wenliang Zhu, Marco Boffelli, Elia Marin, Bryan J. McEntire,