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Superhard materials have attracted worldwide attention due to their important applications in the industrial field. Finding new superhard materials has always been a huge challenge for materialists all over the world. Establishing simple and practical theoretical models to predict the hardness of materials. It is the goal that scientists have been pursuing to guide the synthesis of superhard new materials. The concept of electronegativity was proposed by the famous chemist Pauling in 1932. It represents the ability of atoms to attract and retain electrons. It is a basic atomic parameter widely used in the fields of chemistry, physics and materials science. Based on the electronegativity of the constituent atoms, the authors found that the hardness of the material is essentially determined by the electron-trapping ability of the chemical bond per unit volume, thus establishing a microscopic model between electronegativity and material hardness. The model can not only accurately predict the hardness of the material by the electronegativity and unit cell volume of the constituent atoms, but also select the atomic combination that can form the superhard material, which is of great guiding significance and practicality for people to design new superhard materials. value.
Edited and published by the American Physical Society (APS), the American Physical Review Letter is the most authoritative journal of physical communication in the world, and can report all major basic research results in the field of physics in a timely manner. The journal focuses on general physics (including statistics and quantum mechanics, quantum information, etc.), gravity and astrophysics; fundamental and magnetic fields; nuclear physics; atomic, molecular, and photophysics; nonlinear dynamics, Fluid dynamics and non-quantum optics; plasma and beam physics; solid state physics; soft matter, biology, and interdisciplinary physics. According to the US Science and Technology Information Institute (ISI) Journal Citation Reports (JCR), the 2006 PhysicalReviewLetters impact factor was 7.072.
China has made key breakthroughs in the field of superhard materials technology
Liaoning, China, Professor Xue Dongfeng, Department of Materials and Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, has made significant progress in the research of superhard materials. The research team established a microscopic model to identify the hardness of materials based on the electronegativity of the constituent atoms. The results are the most authoritative in the world. Physical Journal Review (PhysicalReview Letters) received. This is another major research achievement of the research team following the publication of two articles on Advanced Materials.