Force and Energy in Grinding Zirconia Ceramics by Brazed Monolayered Diamond Wheels

2011 ◽  
Vol 487 ◽  
pp. 80-83
Author(s):  
Shu Sheng Li ◽  
Jiu Hua Xu ◽  
Y.C. Fu ◽  
H.J. Xu
Keyword(s):  
Material Removal ◽  
Chip Thickness ◽  
Ground Surface ◽  
Morphological Features ◽  
Removal Mechanism ◽  
Zirconia Ceramics ◽  
Grinding Forces ◽  
Thickness Change ◽  
Material Removal Mechanisms ◽  
Removal Mechanisms

An investigation was undertaken to explore the grinding energy and removal mechanisms in grinding zirconia by using brazed diamond wheels. The grinding forces were measured and the morphological features of ground workpiece surfaces were examined. The results indicate that material removal mechanisms are dominated by the combined removal modes of brittle and ductile. The prevailing removal mechanism for the ground surface of zirconia changes from brittle to ductile when the maximum chip thickness change from large to small.

Comparative Study on the Materials Removal Mechanism of Ceramics and Steels

2008 ◽  
Vol 389-390 ◽  
pp. 18-23
Author(s):  
Jian Qiang Guo ◽  
Hitoshi Ohmori ◽  
Kazutoshi Katahira ◽  
Yoshihiro Uehara
Keyword(s):  
Comparative Study ◽  
Material Removal ◽  
Ground Surface ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Grinding Forces ◽  
Dressing Method ◽  
The Difference ◽  
Induced Defects

Ceramics has many advantages that cannot be substituted by metals, but its machining induced defects, such as crack and crater, are the obstacle of using ceramics in engineering. Thus, the further studies on the materials removal mechanism of ceramics should be done. As known, the cutting theory of metals is very successful and it is helpful to understand the material removal mechanism of ceramics. Through doing comparative experiments, the material removal mechanism of ceramics may be more deeply ascertained. Four types of material, such as ZrO2, SiC, STAVAX and SKD11, were ground by ELID (ELectrolytic In-process Dressing) method in this study. The grinding forces, roughness and topography of the ground surface were investigated. On the basis of this experiment, the difference of material removal mechanism between ceramics and steels was explained.

Investigation of Material Removal Mechanism in EDM of Sintered NdFeB Permanent Magnet

2007 ◽  
Vol 334-335 ◽  
pp. 937-940
Author(s):  
Li Li ◽  
Zong Wei Niu ◽  
Jian Hua Zhang
Keyword(s):  
Permanent Magnet ◽  
Material Removal ◽  
Thermal Cracking ◽  
Removal Mechanism ◽  
Whole Grain ◽  
Material Removal Mechanism ◽  
Ndfeb Magnet ◽  
Material Removal Mechanisms ◽  
Removal Mechanisms ◽  
Ndfeb Permanent Magnet

Sintered NdFeB permanent magnet is widely used in many applications because of its excellent magnet property. However the report of EDM research on NdFeB magnet is not available. This paper presents a detailed investigation of the material removal mechanisms of sintered NdFeB magnet through analysis of the machining debris and the surface SEM quality. It is included three types of machining mechanisms: melting and evaporating, thermal cracking, spalling or whole grain removal.

A Molecular Dynamics Simulation Study of Material Removal Mechanisms in Vibration Assisted Nano Impact-Machining by Loose Abrasives

2017 ◽  
Vol 139 (8) ◽  
Author(s):  
Sagil James ◽  
Murali Sundaram
Keyword(s):  
Material Removal ◽  
Removal Rate ◽  
Dynamics Simulation ◽  
Common Mechanism ◽  
Initial Kinetic Energy ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Material Removal Mechanisms ◽  
Removal Mechanisms ◽  
The Impact

Vibration assisted nano impact-machining by loose abrasives (VANILA) is a novel nanomachining process to perform target-specific nano abrasive machining of hard and brittle materials. In this study, molecular dynamic (MD) simulations are performed to understand the nanoscale material removal mechanisms involved in the VANILA process. The simulation results revealed that the material removal for the given impact conditions happens primarily in ductile mode through three distinct mechanisms, which are nanocutting, nanoplowing, and nanocracking. It was found that domination by any of these mechanisms over the other mechanisms during the material removal process depends on the impact conditions, such as angle of impact and the initial kinetic energy of the abrasive grain. The transition zone from nanocutting to nanoplowing is observed at angle of impact of near 60 deg, while the transition from the nanocutting and nanoplowing mechanisms to nanocracking mechanism is observed for initial abrasive kinetic energies of about 600–700 eV. In addition, occasional lip formation and material pile-up are observed in the impact zone along with amorphous phase transformation. A material removal mechanism map is constructed to illustrate the effects of the impacts conditions on the material removal mechanism. Confirmatory experimentation on silicon and borosilicate glass substrates showed that all the three nanoscale mechanisms are possible, and the nanoplowing is the most common mechanism. It was also found that the material removal rate (MRR) values are found to be highest when the material is removed through nanocracking mechanism and is found to be lowest when the material removal happens through nanocutting mechanism.

Microgrinding of Nanostructured Carbide Coatings: Ground Surface and Subsurface Damage Observations

2006 ◽  
Vol 304-305 ◽  
pp. 276-280 ◽  
Author(s):  
Y.H. Ren ◽  
Zhi Xiong Zhou ◽  
Zhao Hui Deng
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Material Removal ◽  
Ground Surface ◽  
Subsurface Damage ◽  
Removal Mechanism ◽  
Material Removal Mechanism ◽  
Carbide Coatings ◽  
Subsurface Layers ◽  
Scanning Electron

Surface microgrinding of the nanostructured WC/12Co coatings have been undertaken with diamond wheels under various conditions. Nondestructive and destructive approaches were utilized to assess damage in ground nanostructured coatings. Different surface and subsurface configurations were observed by scanning electron microscopy. This paper investigates the effects of microgrinding conditions on damage formation in the surface and subsurface layers of the ground nanostructured WC/12Co coatings. And the material-removal mechanism has been discussed.

Material removal mechanisms by EDM of zirconia reinforced MWCNT nanocomposites

2016 ◽  
Vol 42 (5) ◽  
pp. 5792-5801 ◽  
Author(s):  
Latifa Melk ◽  
Marta-Lena Antti ◽  
Marc Anglada
Keyword(s):  
Material Removal ◽  
Material Removal Mechanisms ◽  
Removal Mechanisms

Study of material removal mechanisms in grinding of C/SiC composites via single-abrasive scratch tests

2019 ◽  
Vol 45 (4) ◽  
pp. 4729-4738 ◽  
Author(s):  
Yuanchen Li ◽  
Xiang Ge ◽  
Hui Wang ◽  
Yingbin Hu ◽  
Fuda Ning ◽  
...  
Keyword(s):  
Material Removal ◽  
Material Removal Mechanisms ◽  
Removal Mechanisms ◽  
Sic Composites ◽  
Scratch Tests
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