Dr. W.J. Zhang
ITF Share: HK$899,500; Sponsorship Share: HK$100,000
1/9/06 - 31/8/07
Based on close cooperation with industry, this proposal aims to develop new superhard film coated devices for applications in advanced manufacturing industry. Two distinctive materials, diamond and cubic boron nitride (cBN) (the hardest and the second hardest materials in the world with outstanding physical and chemical properties), and their combinations will be employed for the new products.
The project will focus on: (i) developing cBN and diamond based superhard coatings on tooling inserts by using physical and chemical vapor deposition (PVD and CVD) methods; (ii) constructing of diamond-cBN superlattices to further enhance the superhard coatings in tooling and tribological applications; and (iii) evaluating of the performance of superhard-film-coated tools in practical machining tests of hard alloys.
The team at City University of Hong Kong (CityU) has an outstanding track record in the field of superhard coatings, including diamond, cBN and diamond-like carbon (DLC) films, and is equipped with a comprehensive set of thin film deposition and characterization facilities. The proposed project will enhance the infrastructure and technology base in the manufacturing industry in Hong Kong.
CityU will utilize the existing R&D facilities (including 3 microwave CVD deposition systems operating in both conventional and electron cyclotron resonance (ECR) modes, two magnetron sputtering systems, and comprehensive and advanced analytical and testing equipments) to develop new superhard coatings and processing technologies for advanced manufacturing devices. Two distinctive materials, diamond and cubic boron nitride (cBN) (the hardest and the second hardest materials), and their combinations will be employed for the new products. The implementation of the project will be based on close cooperation with industry, aiming to develop new-generation, high-performance manufacturing devices for practical applications. The proposed project has the following objectives:
Because of the extreme properties of diamond and cBN, the synthesis and processing of these materials have been extremely difficult and challenging. We have developed several new techniques for the nucleation and growth of high-quality diamond and cBN films, and particularly advanced the cBN technology to the cutting edge of science and art. Our already well-established technology, outstanding track record and know-how in further progress will provide a solid background for achieving the objectives proposed in this project.