Wear of mold surfaces: Interfacial adhesion in precision glass molding

Zhao，Hanhan1,2,3; Gain，Asit Kumar1,2,3; Li，Zhen1,2,3; Zhang，Liangchi1,2,3

2023

10.1016/j.wear.2023.204847

Wear   Impact Factor & Quartile

0043-1648

1873-2577

Micro-optical components, such as glass-based microlens arrays, have become essential in applications relying on advanced optical systems such as 3D displays, optical fiber coupling, and unmanned vehicles. Precision glass molding (PGM) has emerged as a promising method for fabricating optical components based on the formability of glasses beyond their glass transition temperature (T), while adhesion wear strength and mechanism of mold-glass interfaces remain major obstacles. This paper aims to explore the adhesion wear mechanisms between mold surfaces and optical glass D-FK95 in PGM. The applicability of WC molds with coatings of Ta–C, AlCrN, and AlTiN was investigated respectively considering their thermodynamic properties and surface energy characteristics. The study identified three adhesion wear mechanisms in the open-air atmosphere with WO oxidation on mold surfaces and four adhesion mechanisms featured by scattered distribution, island aggregation, dispersed flow, and planar coverage in an inert atmosphere. It was also found that when the temperature was close to T, the WC-glass adhesion force was negligible. The adhesion stress increased to 0.80 MPa with an increase in the applied temperature and pressure. With coating, however, the adhesion stress reduced significantly to 0.03 MPa. The study also concluded that when paired with the D-FK95 glass, the WC mold coated with Ta–C provides the best anti-adhesive performance in comparison to those with AlCrN and AlTiN coatings.

Adhesion mechanism Effect of coating Precision glass molding Surface quality

SCI

English

Corresponding

National Natural Science Foundation of China[52293401];

Engineering ; Materials Science

Engineering, Mechanical ; Materials Science, Multidisciplinary

WOS:000988665200001

ELSEVIER SCIENCE SA

MATERIALS SCIENCE

2-s2.0-85151654388

Scopus

1.Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics,China
2.SUSTech Institute for Manufacturing Innovation,China
3.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Zhao，Hanhan,Gain，Asit Kumar,Li，Zhen,et al. Wear of mold surfaces: Interfacial adhesion in precision glass molding[J]. Wear,2023,524.

Zhao，Hanhan,Gain，Asit Kumar,Li，Zhen,&Zhang，Liangchi.(2023).Wear of mold surfaces: Interfacial adhesion in precision glass molding.Wear,524.

Zhao，Hanhan,et al."Wear of mold surfaces: Interfacial adhesion in precision glass molding".Wear 524(2023).