Article
Chemistry, Physical
Beidi Chen, Nianyao Chai, Jinyong Zhang, Lin Ren, Weimin Wang, Fan Zhang, Xuewen Wang, Zhengyi Fu
Summary: In this paper, a novel approach to create hierarchical micro-nano surface structures on B4C using femtosecond laser irradiation is proposed. The results show that the phase structure of the sample changes after irradiation, and the wetting performance of the solution on B4C is significantly improved. This work provides a new idea for enhancing the wetting of metal/ceramic systems.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Dariusz Bartkowski
Summary: The study presents the results of producing Fe/TaC metal matrix composite coatings on tool steel using laser processing of TaC pre-coat. It was found that it is possible to produce coatings with a characteristic composite structure, where the iron from the substrate becomes the matrix and the introduced tantalum carbides act as the reinforcing phase. The influence of pre-coat thickness and laser beam power on the microstructure, chemical composition, and microhardness of the coatings was analyzed.
Article
Materials Science, Multidisciplinary
Jianwei Zhang, Qiang Zhao, Dongying Chen, Peng Sun, Dawei Du, Chuanjie Zhang, Jianlei Cui
Summary: This letter presents the flexibility of point by point (PbP) method via femtosecond (fs) laser for inscribing fiber Bragg gratings (FBGs), and investigates the influence of different factors on reflectivity, 3 dB bandwidth, and sidelobe suppression. The results show that increasing the grating order is a more efficient way.
Article
Materials Science, Coatings & Films
Mark Anderson, Aaron Ediger, Alfred Tsubaki, Craig Zuhlke, Dennis Alexander, George Gogos, Jeffrey E. Shield
Summary: Comparison between femtosecond and picosecond laser pulses on copper surface features revealed that femtosecond pulses result in non-uniform structure formation, while picosecond pulses can produce uniform quasi-periodic structures with high repeatability. Investigation of the subsurface microstructure showed that picosecond pulses lead to finer-grained regions within mounds and onion-like layers near the surface. Multiple formation mechanisms were proposed to explain the microstructures formed using picosecond pulses.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Dariusz Bartkowski
Summary: This study tested the parameter analysis and obtained properties of the Fe/ZrC coatings production process. The results showed that the laser beam power had significant effects on the microstructure, chemical composition, and microhardness.
Article
Materials Science, Multidisciplinary
Yanan Liu, Ye Ding, Liangliang Xu, In Wha Jeong, Lijun Yang
Summary: In this study, a one-step fs laser-induced monocrystalline silicon structure was fabricated to enhance its nano-hardness properties. The results revealed three layers in the irradiated structure: an amorphous silicon layer, a dislocation layer, and a silicon crystal layer. The dislocation layer, with numerous dislocations and lattice distortions, positively influenced the nano-hardness of the irradiated structure, while the silicon crystal layer remained unaffected by laser irradiation.
Article
Materials Science, Multidisciplinary
Wenjin Li, Qian Ding, Xianzhi Wang, Zhaohua Wang, Zhiyi Wei, Haizheng Xu, Lei Zhang
Summary: An acrylic resin guide rail was designed and 3D printed to facilitate femtosecond laser surface microstructuring on zirconia dental implant, resulting in two surface topographies: microgrooves and nanoparticles. The fracture strength of control, microgrooved, and nanoparticles implants were 907.8 +/- 59.0 N, 793.7 +/- 83.3 N, and 755.6 +/- 144.5 N, respectively. Using femtosecond laser with the advocated guide rail is an effective method to fabricate micro-nano hierarchical topographies on zirconia dental implants precisely.
Article
Materials Science, Multidisciplinary
Zhaoyang Zhai, Ruihua Zhang, Aofei Tang, Yanchao Zhang, Xian Wang, Yahui Cui
Summary: The femtosecond laser diffraction can fabricate a regular multi-leveled concentric ring structure on the surface of C/SiC composites, allowing for controllable morphology and size by adjusting processing parameters. The spot energy distribution generated by femtosecond laser diffraction is more uniform than that of Gaussian beam, making it suitable for surface polishing of C/SiC composites.
Article
Materials Science, Multidisciplinary
M. Bala Subramanian, K. S. Resmi, Prita Nair, E. Manikandan, Ravi Nathuram Bathe
Summary: This study demonstrates the feasibility of laser-etching waveguides on crystalline BNA films, successfully realizing single crystal BNA waveguides and providing a new method for microstructure fabrication.
Article
Chemistry, Physical
Dariusz Bartkowski, Aneta Bartkowska, Damian Przestacki, Peter Jurci, Piotr Kieruj
Summary: This study presents the results of coatings produced by remelting a VC pre-coat applied on 145Cr6 steel using a diode laser beam. The obtained coatings showed different properties than the base material, with increased microhardness and wear resistance.
Article
Optics
Qi Hu, Haomin Guo, Haiwen Liu, Runmin Wu, Chengyun Zhang
Summary: The letter proposes a processing method based on laser-induced backward transfer (LIBT) technique, where the sample is placed in a bound state to achieve equal-thickness interference, and laser direct writing (LDW) ablation and interference effect are combined to induce 2D biperiodic microstructures. The effects of laser power and interference pattern on the microstructures are studied.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Kaiwen Ding, Cong Wang, Jian Duan
Summary: In this paper, wet chemical etching is used to improve the surface quality and size of femtosecond laser fabricated microstructures on zinc sulfide (ZnS). Nitric acid solution is chosen as the etchant. The study investigates the changes in surface morphology and size evolution of microgrooves with different etching conditions. The results provide an explanation for the effects of etching on surface quality and size.
Article
Materials Science, Ceramics
Jiandong Wang, Yuzhou Zeng, Xiaopeng Qi, Yu Xue, De Xu, Liqun Li, Yunxiang Tong, Fengchun Jiang
Summary: In this paper, TiCp/Ti6Al4V composites were fabricated using laser melting deposition (LMD) technology and the microstructure and microhardness of different deposited layers were analyzed. The results show that the composites have a graded microstructure and microhardness distribution. The microhardness increases gradually from the bottom layer to the top layer in the low power composite, while the high power composite shows a more significant increase in microhardness.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Jin Wang, Yoshio Hayasaki, Fengyun Zhang, Xi Wang, Satoshi Hasegawa, Honghao Zhang, Pingping Wang, Yadi Wang, Shufeng Sun
Summary: A novel three-dimensional holographic femtosecond laser parallel processing method based on the fractional Fourier transform was proposed for arbitrary microstructures inside glass materials. It has shown high speed, high resolution, and excellent control over uniformity and positional accuracy.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Mengfei Ren, Ruifeng Li, Xiaoqiang Zhang, Jiayang Gu, Chen Jiao
Summary: Ni60 and WC composite coatings were prepared on 17-4PH martensitic stainless steel, and the coating with 30 wt% agglomeration-sintering WC (AS-WC) exhibited higher hardness and better wear resistance compared to the coating with 30 wt% sintering-crushing WC (SC-WC) and the Ni60 coating without WC. Microstructure analysis showed that the AS-WC doped coating had a higher amount of dispersed carbides, resulting in its superior mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)