PhD student Nguyen Hong Tien successfully defends department-level doctoral dissertation

On August 26th , 2025, at the School of Mechanical and Automotive Engineering (SMAE) Hanoi University of Industry, PhD student Nguyen Hong Tien successfully defended his department-level doctoral dissertation on the topic: “Research on enhancing the wear resistance of high-load presss screws using a combination of computational design and advanced surface treatment solutions.”

The defense was conducted in a formal and professional atmosphere with the participation of a Doctoral Dissertation Evaluation Council comprising seven scientists, chaired by Assoc. Prof. Dr. Tran Duc Quy from Hanoi University of Industry.

The speech of Assoc. Prof. Dr. Tran Duc Quy, Hanoi University of Industry, Chairman of the Council

Under the dedicated guidance of Assoc. Prof. Dr. Nguyen Tuan Linh and Dr. Nguyen Van Thien from Hanoi University of Industry, PhD student Nguyen Hong Tien focused on solving a pressing issue in clean coal production, which is the wear and short lifespan of high-load press screws. The dissertation's main objective was to enhance the wear resistance of this component, thereby contributing to increased equipment longevity, improved production efficiency, and reduced operational costs.

The defense of dissertation before the Council of PhD student Nguyen Hong Tien.

The dissertation's research was systematically and scientifically structured, incorporating three main methods: theoretical analysis, numerical simulation, and experimentation. The candidate optimized the press screw's geometric design and used the Discrete Element Method (DEM) simulation to evaluate the material pressing process. Notably, the dissertation demonstrated that combining an optimized geometric design with advanced surface treatment technology, specifically an HVOF coating, is an effective solution to reduce wear, extend service life, and enhance the performance of the press screw.

An overview of the department-level doctoral dissertation defense council for PhD student Nguyen Hong Tien

The experimental results confirmed that the solutions proposed in the dissertation are highly applicable and yield significant results. The average wear of the optimized and HVOF-coated press screw was considerably reduced compared to conventional screws. The dissertation successfully developed mathematical models to control the quality of the coating, providing a basis for its application in industrial production.

The success of PhD student Nguyen Hong Tien is not only a result of his individual efforts but also a testament to the dynamic and specialized research environment at SMAE. The research has made important contributions in both scientific and practical terms, not only for the clean coal industry but also with potential for broad application in many other industrial fields.

The dissertation's findings have been published in numerous reputable international scientific journals, including those in the Scopus Q2 and Q3 categories, affirming the quality and scientific value of the research. This further solidifies the research standing and capabilities of lecturers and PhD students at SMAE, contributing to the overall advancement of science and technology in the field of mechanics.

SOME PHOTOS FROM THE DEPARTMENT-LEVEL DOCTORAL DISSERTATION DEFENSE FOR PHD STUDENT NGUYEN HONG TIEN