Surface Characteristics of Medical Zr-Based Bulk Metallic Glass Processed by Femtosecond Laser

Yansheng, 姚燕生 Yao; Zhangsen, 葛张森 Ge; Qingbo, 陈庆波 Chen; Jianping, 唐建平 Tang; Yiyuan, 张亦元 Zhang

doi:10.3788/lop57.111409

Cited by 4 publications

(1 citation statement)

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“…This results in the composite interface formed between the bottom surface of the droplet and the groove, more easily transitioning from the unstable Cassie state to the Wenzel state when the cooling liquid droplet comes in contact with the sample surface. This leads to increased wettability of the metal surface [ 32 ]. The cooling liquid is more likely to remain on the edge of the sample after W-EDM processing, forming a water film.…”

Section: Mechanismmentioning

confidence: 99%

Research on Deterioration Mechanism and High-Precision Modelling of the Core Loss for Amorphous Alloys after Wire-Cut Electric Discharge Machining

et al. 2023

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Amorphous alloys (AAs) have the advantage of low core loss. Thus, they can be used in high-speed motor applications. However, compared with the nominal performances, the performance of the wire-cut electric discharge machine (W-EDM)-processed AA iron core changes significantly, which limits its popularization. This paper focuses on the performance degradation mechanism of the AA ribbon caused by W-EDM and establishes a modified core loss model after machining. First, a 308 × 15 mm ribbon-shaped AA sample machined by W-EDM was prepared. The characterization and analysis of the magnetic properties, phase, magnetic domain, nano-indentation, micro-morphology, and composition were carried out. In this paper, by analysing the variation in the magnetic domain distribution based on domain width and nano-mechanical properties, it is proposed that the performance degradation range of AA ribbons processed by W-EDM is within 1 mm from the edge. By comparing the microscopic morphology and chemical composition changes in the affected and the unaffected area, this paper presents a mechanism for the property deterioration of W-EDM-processed AA ribbons based on electrochemical corrosion. Finally, a modified loss model for W-EDM-processed AAs is established based on the division of the affected area. This model can significantly improve the accuracy of core loss estimation in the medium- and high-frequency bands commonly used in high-speed motors.

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Section: Mechanismmentioning

confidence: 99%

Research on Deterioration Mechanism and High-Precision Modelling of the Core Loss for Amorphous Alloys after Wire-Cut Electric Discharge Machining

et al. 2023

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A Review of an Investigation of the Ultrafast Laser Processing of Brittle and Hard Materials

Feng,

Wang,

Liu

et al. 2024

Materials

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Ultrafast laser technology has moved from ultrafast to ultra-strong due to the development of chirped pulse amplification technology. Ultrafast laser technology, such as femtosecond lasers and picosecond lasers, has quickly become a flexible tool for processing brittle and hard materials and complex micro-components, which are widely used in and developed for medical, aerospace, semiconductor applications and so on. However, the mechanisms of the interaction between an ultrafast laser and brittle and hard materials are still unclear. Meanwhile, the ultrafast laser processing of these materials is still a challenge. Additionally, highly efficient and high-precision manufacturing using ultrafast lasers needs to be developed. This review is focused on the common challenges and current status of the ultrafast laser processing of brittle and hard materials, such as nickel-based superalloys, thermal barrier ceramics, diamond, silicon dioxide, and silicon carbide composites. Firstly, different materials are distinguished according to their bandgap width, thermal conductivity and other characteristics in order to reveal the absorption mechanism of the laser energy during the ultrafast laser processing of brittle and hard materials. Secondly, the mechanism of laser energy transfer and transformation is investigated by analyzing the interaction between the photons and the electrons and ions in laser-induced plasma, as well as the interaction with the continuum of the materials. Thirdly, the relationship between key parameters and ultrafast laser processing quality is discussed. Finally, the methods for achieving highly efficient and high-precision manufacturing of complex three-dimensional micro-components are explored in detail.

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超疏水氧化锆陶瓷表面的激光加工+硅油修饰+热处理复合工艺及机理研究

Liu Chao,

Zheng Junjie,

Liu Xiangfeng

et al. 2023

中国激光

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Surface Characteristics of Medical Zr-Based Bulk Metallic Glass Processed by Femtosecond Laser

Cited by 4 publications

References 0 publications

Research on Deterioration Mechanism and High-Precision Modelling of the Core Loss for Amorphous Alloys after Wire-Cut Electric Discharge Machining

Research on Deterioration Mechanism and High-Precision Modelling of the Core Loss for Amorphous Alloys after Wire-Cut Electric Discharge Machining

A Review of an Investigation of the Ultrafast Laser Processing of Brittle and Hard Materials

超疏水氧化锆陶瓷表面的激光加工+硅油修饰+热处理复合工艺及机理研究

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