Results 91 to 100 of about 5,876 (143)

Changing the Performance of Diamond Finishing of Ceramic Balls of Boron Carbide and Silicon Nitride

Journal of Superhard Materials, 2021
To improve diamond finishing of B4C and Si3N4 ceramic balls, we investigated patterns of changes in productivity and accuracy of processing, namely, an average diameter of balls in a batch, difference in the diameters of balls in a batch, arithmetic mean variations in the diameter of balls, and rate of change of these indicators. We obtained linear and
S V Sokhan’, Sokhan’ S V
exaly   +3 more sources

Tensile stress fatigue life model of silicon nitride ceramic balls

Tribology International, 2009
Abstract The RCF (rolling contact fatigue) life of ceramic balls is a reliable technique to assess whether or not they are suitable to be used in rolling bearings. The relation expression between failure probability and RCF life was deduced with Weibull fracture statistic method for the silicon nitride ceramic ball in ball–cylinder geometric model ...
J.L. Zhou, G.Q. Wu, W.N. Zhu, X.Y. Chen
exaly   +3 more sources

Experimental research on the residual stress in the surface of silicon nitride ceramic balls

Journal of Materials Processing Technology, 2002
Abstract The influence of thermal stress produced in sintering and mechanical stress formed in the lapping process on the residual stress in the surface of silicon nitride ceramic balls is discussed in this paper. By measuring the specific volume, the distribution of residual stress was analyzed and calculated.
T Y Wang
exaly   +3 more sources

The Performance of Ball Bearings With Silicon Nitride Ceramic Balls in High Speed Spindles for Machine Tools

Journal of Tribology, 1988
Two types of angular contact ball bearings for machine tools having steel rings and silicon nitride balls were tested and the temperature rise was compared with that of conventional steel ball bearings with grease lubrication and oil-air lubrication as well.
Hirotoshi Aramaki, Yoshio Shoda, Yuka Morishita, Takeshi Sawamoto   +3 more
exaly   +3 more sources

Fracture characteristics of silicon nitride ceramic ball subjected to thermal shock

Journal of Materials Science, 2016
The aim of this study was to clarify the fracture characteristics of ceramic balls, as used in bearings, when subjected to thermal shock. First, water-quench tests were performed on ceramic balls of a range of sizes. The fracture morphology and fracture surface were then observed.
S. Matsuda
openaire   +2 more sources

Crack growth and splitting failure of silicon nitride ceramic balls under cyclic pressure loads

Mechanics of Materials, 2017
Abstract In order to examine the splitting failures of silicon nitride balls under cyclic pressure loads, fatigue tests of pre-cracked balls were carried out. The cracks of initial length ranging from 0.260 to 0.290 mm were observed under different stress ratio conditions and the effects of stress ratio and residual stress on the fatigue strength ...
Katsuyuki Kida
exaly   +2 more sources

Formation mechanism of transfer films between PEEK-based materials and silicon nitride ceramic balls under varying loads

Industrial Lubrication and Tribology
Purpose This study aims to further investigate the tribological behavior of polyether ether ketone (PEEK) and its composites against silicon nitride (Si3N4), with a focus on analyzing the transfer film formation mechanism and the lubricating roles of various fillers in the PEEK composites during the film-forming
Jian Sun, Yang Zhang, Kun Wang, Zhili Zhang, Jinmei Yao, Xiaoguo Gao, Jieming Zhang   +6 more
openaire   +2 more sources

Simple mechanics model and Hertzian ring crack initiation strength characteristics of silicon nitride ceramic ball subjected to thermal shock

Engineering Fracture Mechanics, 2018
Abstract This study investigated the ring crack initiation strength characteristics of silicon nitride ceramic balls subjected to thermal shock. Sphere indentation tests were conducted on ceramic balls following water quenching and furnace cooling operations performed in air and vacuum.
Shinya Matsuda, Takeshi Nakada
openaire   +2 more sources

The Glass-Free Grain Boundary in HIP-Processed Silicon Nitride Ceramic Balls

Journal of Materials Engineering and Performance
Feng Sun, Jia-Xing Bao, Song Chen, Ming-Liang Zhao, Zai-Yi Wang, De-Chang Jia, Wei-Ru Zhang, Wei-Guo Wang   +7 more
openaire   +2 more sources

Semantic segmentation method for micro-cracks in silicon nitride ceramic bearing balls based on coupling of edge channel enhancement and weighted gated attention mechanism in EMU-Net+

Measurement: Journal of the International Measurement Confederation
, Xin Wang, Fu-Ping Huang
exaly   +2 more sources