دورية أكاديمية
Multilayer Diamond Coatings Applied to Micro-End-Milling of Cemented Carbide
| العنوان: | Multilayer Diamond Coatings Applied to Micro-End-Milling of Cemented Carbide |
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| المؤلفون: | Eduardo L. Silva, Sérgio Pratas, Miguel A. Neto, Cristina M. Fernandes, Daniel Figueiredo, Rui F. Silva |
| المصدر: | Materials, Vol 14, Iss 12, p 3333 (2021) |
| بيانات النشر: | MDPI AG, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Technology LCC:Electrical engineering. Electronics. Nuclear engineering LCC:Engineering (General). Civil engineering (General) LCC:Microscopy LCC:Descriptive and experimental mechanics |
| مصطلحات موضوعية: | micro-end-milling, CVD diamond, multilayer coating, cemented carbide, transmission electron microscopy, Technology, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Engineering (General). Civil engineering (General), TA1-2040, Microscopy, QH201-278.5, Descriptive and experimental mechanics, QC120-168.85 |
| الوصف: | Cobalt-cemented carbide micro-end mills were coated with diamond grown by chemical vapor deposition (CVD), with the purpose of micro-machining cemented carbides. The diamond coatings were designed with a multilayer architecture, alternating between sub-microcrystalline and nanocrystalline diamond layers. The structure of the coatings was studied by transmission electron microscopy. High adhesion to the chemically pre-treated WC-7Co tool substrates was observed by Rockwell C indentation, with the diamond coatings withstanding a critical load of 1250 N. The coated tools were tested for micro-end-milling of WC-15Co under air-cooling conditions, being able to cut more than 6500 m over a period of 120 min, after which a flank wear of 47.8 μm was attained. The machining performance and wear behavior of the micro-cutters was studied by scanning electron microscopy and energy-dispersive X-ray spectroscopy. Crystallographic analysis through cross-sectional selected area electron diffraction patterns, along with characterization in dark-field and HRTEM modes, provided a possible correlation between interfacial stress relaxation and wear properties of the coatings. Overall, this work demonstrates that high adhesion of diamond coatings can be achieved by proper combination of chemical attack and coating architecture. By preventing catastrophic delamination, multilayer CVD diamond coatings are central towards the enhancement of the wear properties and mechanical robustness of carbide tools used for micro-machining of ultra-hard materials. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1996-1944 |
| العلاقة: | https://www.mdpi.com/1996-1944/14/12/3333Test; https://doaj.org/toc/1996-1944Test |
| DOI: | 10.3390/ma14123333 |
| الوصول الحر: | https://doaj.org/article/d96ecd2d4b93428ba3425a09495ae734Test |
| رقم الانضمام: | edsdoj.96ecd2d4b93428ba3425a09495ae734 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 19961944 |
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| DOI: | 10.3390/ma14123333 |