Results 11 to 20 of about 9,650 (209)

Surface fracture behavior and subsurface damage of polycrystalline yttrium aluminum garnet ceramics in Vickers indentation

open access: yesJournal of Materials Research and Technology, 2023
In this paper, the Vickers indentation experiments were carried out under different loads on the polished surface of polycrystalline yttrium aluminum garnet (YAG) ceramics to investigate the surface fracture behavior and subsurface damage under quasi ...
Hang Yin   +5 more
doaj   +1 more source

Evaluating subsurface damage in optical glasses [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2011
Hard brittle materials (e.g. glasses and ceramics) increasingly appeal to general interests because of their excellent physical, mechanical and chemical properties such as super hardness and strength at extreme temperature and chemical stability.
Wang Jian   +4 more
doaj   +1 more source

Research on Damage Characteristics of Ultrasonic Vibration-Assisted Grinding of a C/SIC Composite Material

open access: yesSensors, 2022
C/SiC composites are the preferred materials for high temperature resistant (usually above 1500 °C) structural parts in aerospace, aviation, shipbuilding, and other industries.
Dongpo Wang, Qiushi Liang, Dong Xu
doaj   +1 more source

Laser-based defect characterization and removal process for manufacturing fused silica optic with high ultraviolet laser damage threshold

open access: yesLight: Advanced Manufacturing, 2023
Residual processing defects during the contact processing processes greatly reduce the anti-ultraviolet (UV) laser damage performance of fused silica optics, which significantly limited development of high-energy laser systems.
Xiaocong Peng   +9 more
doaj   +1 more source

Finite Element Modeling of Brittle and Ductile Modes in Cutting of 3C-SiC

open access: yesCrystals, 2021
Machining of brittle ceramics is a challenging task because the requirements on the cutting tools are extremely high and the quality of the machined surface strongly depends on the chosen process parameters.
Masud Alam   +4 more
doaj   +1 more source

Failure mode change and material damage with varied machining speeds: a review

open access: yesInternational Journal of Extreme Manufacturing, 2023
High-speed machining (HSM) has been studied for several decades and has potential application in various industries, including the automobile and aerospace industries.
Jianqiu Zhang, Binbin He, Bi Zhang
doaj   +1 more source

Molecular Dynamic Investigation of the Anisotropic Response of Aluminum Surface by Ions Beam Sputtering

open access: yesMicromachines, 2021
Aluminum optics are widely used in modern optical systems because of their high specific stiffness and high reflectance. With the applied optical frequency band moving to visible, traditional processing technology cannot meet the processing precision ...
Chunyang Du   +3 more
doaj   +1 more source

Effect of H2O2 Treatment on Mechanical and Mechanochemical Properties of Fused Silica

open access: yesApplied Sciences, 2023
The surface properties of fused silica (FS) change after H2O2 treatment, but the surface and subsurface damage behaviors and their mechanisms under various physical contact conditions have not been elucidated yet.
Xinqi Liu   +8 more
doaj   +1 more source

Theoretical Modeling and Experimental Analysis of Single-Particle Erosion Mechanism of Optical Glass

open access: yesMicromachines, 2021
The study of the single-particle erosion mechanism is essential to understand the material removal mechanism in the non-contact polishing process and ultimately ensure the high-efficiency, non-damage, and ultra-smooth processing of optical glass. In this
Zhongchen Cao   +3 more
doaj   +1 more source

Nondestructive Evaluation of Functionally Graded Subsurface Damage on Cylinders in Nuclear Installations Based on Circumferential SH Waves

open access: yesScience and Technology of Nuclear Installations, 2016
Subsurface damage could affect the service life of structures. In nuclear engineering, nondestructive evaluation and detection of the evaluation of the subsurface damage region are of great importance to ensure the safety of nuclear installations.
Zhen Qu, Xiaoqin Shen, Xiaoshan Cao
doaj   +1 more source

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