What kind of material is thermal sprayed nano-coating? What effect does it have on high-end equipment? In the afternoon of May 25th, in order to let everyone better understand the thermal spraying nano-coating and its practical significance, Wang You, a professor and doctoral supervisor of the Department of Materials Science of Harbin Institute of Technology, gave a special lecture in classroom 301 of the Economic Management Building.
Before the lecture, Professor Fang Liang, Dean of the School of Mechanical and Electrical Engineering, introduced Professor Wang You's scientific research experience and achievements to the audience. Professor Wang You was a visiting professor at the University of Alberta in Canada, a senior engineer at the American Nanomaterials Group, a visiting scientist at the American Institute of Standards and Technology, etc., in nanosurface engineering, nano-modified materials, 3D printing, ceramic materials, tribology, etc. He has deep attainments and has published more than 280 papers, of which more than 160 have been indexed by SCI, and have been cited more than 3000 times by peers. The H factor of SCI is 28.
The emergence of nanotechnology in the 1970s brought people into the nano era. Surface engineering is closely related to nanomaterials and nanotechnology, because special surface properties are one of the important and unique properties of nanomaterials. Therefore, the thermal spraying nano-coating technology, which combines nanomaterials and thermal spraying technology and comprehensive application, can more effectively solve the equipment operation failure caused by serious corrosion, wear, high temperature, etc. of ships, aircrafts and high-end equipment on land. , The problem of declining life expectancy. At the beginning of the lecture, Professor Wang You introduced the reasons for the birth of thermal spraying nano-coating technology and its effects.
When explaining the development process of thermal spraying nano-coating technology in the past 20 years, Professor Wang You used eight "ones" to explain: a patent promoted spraying nano-technology; a project started the industrialization of thermal spraying nano-coating materials; one This kind of modification technology has promoted the successful application of thermal spraying nano-coating; one paper recorded the earliest research of thermal spraying nano-coating; one obtained the self-lubricating coating of thermal spraying technology by accident; a post transfer accelerated the liquid material heating The success of spraying nanotechnology thermal barrier coating; a dream created a new type of thermal spraying nanotechnology thermal barrier coating; a sense of responsibility made us choose thermal spraying nano coating.
"How to make more nano-patents in the field of thermal spraying nano-coating?" Professor Wang You emphasized the importance of nano-powder reconstruction to promote this matter. He said that by adjusting the powder structure, the key scientific problem of low toughness of ceramic materials can be solved. He also said that the current research has obtained key technologies with independent intellectual property rights, and has produced alumina-based ceramic composites with excellent performance and thermal spraying nano-coatings. Professor Wang You explained in detail the structure, performance and performance of the three coating materials: nanostructured wear-resistant and corrosion-resistant ceramic coatings, nanostructured double ceramic thermal barrier coatings, and nano-modified cermet coatings that replace hard chromium plating. Application in related fields.
Finally, Professor Wang You looked forward to the future of thermal spraying of nano-coatings. He predicts that by 2025, the global thermal spray nano coating market will reach 6.5 billion US dollars, of which about 20% of the market share is in China. Therefore, he pointed out that thermal spraying technology is the future development direction, and emphasized the importance of nanocomposite coatings in the development of thermal spraying. "Why is there a big gap between my country's domestically-produced engines and the United States and other countries?" He said that the index of materials accounted for a very large factor. "The development of thermal spraying nano-coating technology and the production of more high-performance materials are exactly what we need to strengthen the country and the army!"
In the questioning session, the students exchanged ideas with Professor Wang You about the applications of thermal spraying nano-coatings in the civil field. Professor Wang You pointed out that thermal spraying nano-coatings are not only used in military defense, but also in the production and life of civilian fields, such as non-stick pans for cooking, bearings and valves in automobiles. "It is the application of thermal spraying nano-coating that will make products more resistant to high temperature, wear and corrosion, and increase their service life." |
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