**Abstract**
In 1985, with the support of the former Ministry of Machinery Industry and approval from the State Education Commission, Yanshan University established a specialized program in superhard materials, marking the beginning of undergraduate and graduate education in this field. Today, the program admits 3–6 doctoral students and 8–15 master's students annually, contributing significantly to the development of research capabilities and advanced talent training. The School of Materials Science and Engineering, where this specialty resides, is a research-oriented institution that offers a Ph.D. in Materials Science and Engineering and hosts a postdoctoral research station. It includes six secondary disciplines, such as materials science, material physics and chemistry, and metastable material preparation technology. The school has also established the State Key Laboratory of Metastable Materials Preparation Technology and Science, with superhard materials being one of its key research areas.
The school has participated in major national projects like the “973†Program, the “863†Program, and the National Natural Science Foundation, among others. Over 200 R&D projects have been completed across various industries, resulting in more than 50 patents, several national and provincial awards, and over 1,200 academic papers, including more than 800 indexed in SCI, EI, and ISTP. Research in superhard materials has focused on international frontiers and critical issues affecting diamond tool development in China, leading to collaborations with domestic and foreign manufacturers.
Wang Yanhui, along with his team, has made significant contributions through innovative technologies such as vacuum micro-evaporation plating for diamond and cubic boron nitride, corundum-coated abrasives, low-temperature titanium plating, and nano-ceramic binders. These advancements have been widely applied in industrial settings, improving performance, reducing costs, and enhancing product quality. Their work has been published in top-tier journals and cited extensively by leading researchers in the field.
The vacuum micro-evaporation plating technology developed at Yanshan University has become a standard in the industry, with applications in saw blades, grinding tools, and drilling equipment. This technology not only improves the bonding strength between diamond particles and the binder but also enhances the durability and efficiency of diamond tools. The use of titanium-plated diamonds has reduced diamond consumption by up to 20%, lowered production costs, and improved the overall performance of cutting and grinding tools.
Additionally, the school has pioneered micro-powder plating techniques, enabling large-scale industrial application of fine abrasive particles. The Ti-Ni composite plating process further enhances the bonding properties of diamonds, making them suitable for metal sintering and brazing applications. Corundum-coated diamonds and nano-ceramic binders have also shown great promise, offering improved wear resistance and cost-effectiveness compared to traditional methods.
Overall, the research and development efforts in superhard materials at Yanshan University have played a vital role in advancing the domestic and global diamond tool industry, setting new standards for performance, reliability, and innovation. (Author: Wang Yanhui, State Key Laboratory of Metastable Materials Science and Technology, Yanshan University)
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