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Performance and Durability Enhancement of Tungsten Carbide Micro-Drills by Ti/ta-C Coatingsстатья
- Авторы: Samardak Vadim Yu, Samardak Alexander S., Ognev Alexey V., Goloviatinski Sergey, Mikhallov Sergey N., Zavaleyev Victor
- Журнал: Key Engineering Materials
- Том: 806
- Год издания: 2019
- Издательство: Trans Tech Publications Ltd.
- Местоположение издательства: Germany
- Первая страница: 76
- Последняя страница: 80
- Номер статьи: 1662-9795
- DOI: 10.4028/www.scientific.net/kem.806.76
- Аннотация: This paper presents results of the application of Ti/ta-C films to micro drilling operation for machining. Tetrahedral amorphous carbon (ta-C) films were successfully deposited on WC-Co substrates by a filtered cathodic vacuum arc (FCVA) system. The mechanical and bending properties of Ti/ta-C films were systematically investigated. The experimental results show that the Ti/ta-C coated micro drills have the excellent microhardness, adhesion and bending properties and represent the optimal coatings for micro drilling applications. The role of the Ti –sublayer on a sintered powder tungsten carbide substrate is not only limited by the adhesion improvement, but it is mainly used to neutralise the grain boundary microcracks on a surface. The results of drilling tests carried out on PCB boards showed that the durability and drilling efficiency of tools coated by Ti/ta-C films are significantly higher than that of uncoated ones.
- Добавил в систему: Завалеев Виктор Анатольевич