Invited Speaker

Prof. Bin Shen

Shanghai Jiao Tong University

E-mail：binshen@sjtu.edu.cn

Title: 

Covalent Graphene-diamond Heterostructure with Ultrahigh Mechanical Robustness

Profile:

Bin Shen, Professor and Ph.D. supervisor at Shanghai Jiao Tong University, is a recipient of the National Science Fund for Excellent Young Scholars. He currently serves as Director of the Institute of Manufacturing Technology and Equipment Automation and Deputy Director of the State Key Laboratory of Mechanical System and Vibration. His research focuses on high-performance graphene/diamond structure fabrication, advanced surface manufacturing, and intelligent manufacturing. Professor Shen has received numerous awards including the Second Prize of the National Science and Technology Progress Award, First Prize (Technical Invention) of the China Machinery Industry Science and Technology Award, Second Prize of the Shanghai Science and Technology Progress Award, the CMES-Yin Silver Outstanding Mechanical Ph.D. Thesis Award (Bronze), and the Shanghai Outstanding Doctoral Dissertation Award. As principal investigator, he has led over 10 national/provincial projects such as the National Science Fund for Excellent Young Scholars, NSFC Joint Fund Project, and National Key R&D Program. With 100+ SCI publications in journals including International Journal of Machine Tools and Manufacture, Journal of the American Chemical Society, and Carbon, he has also spearheaded the development of 2 industry technical standards.

Abstract:

This presentation focuses on the fabrication, properties, and applications of graphene-diamond covalent heterostructures. Our research team successfully synthesized high-quality few-layer graphene sheets via liquid metal gallium-catalyzed CVD and achieved covalent bonding with diamond substrates. Systematic studies revealed the growth mechanism: graphene sheets epitaxially grow along the diamond (111) crystal plane, forming a stable hexagonal C6 covalent bonding configuration. Furthermore, through nano-scratch testing and molecular dynamics simulations, we investigated the interfacial bonding strength and mechanical behavior, revealing an interfacial tensile strength of 150 GPa—exceeding the intrinsic strength of graphene itself. The heterostructure exhibits exceptional wear resistance and low friction coefficients at both macro- and micro-scales. Leveraging this high-performance heterostructure, we developed a fabrication process for graphene-diamond covalent heterostructure coatings and applied them to cutting tools and abrasives. Experiments demonstrate that the coating significantly reduces cutting forces and tool wear, enhances polycrystalline diamond polishing efficiency by over 150%, and substantially improves surface finish quality. This research pioneers new directions for high-performance cutting tool coatings and abrasive technologies, expands the hybrid-dimensional heterostructure technology framework, and holds promise for advancing efficient precision machining in aerospace and third/fourth-generation semiconductors.