Characteristics of Abrasive Jet Machining of Silicon Nitride Ceramic.

Wakuda, Manabu; Yamauchi, Yukihiko; Kanzaki, Shuzo

doi:10.2493/jjspe.67.1703

Cited by 4 publications

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“…It is thought that this was caused by the peening effect of the impacting particles, as is commonly observed in the shot peening of metal surfaces. 12 The authors have previously reported 13 that the depth of the induced compressive stress layer in the case of AJM of a silicon nitride sample was ϳ10 m, and it is thought that in this present work the affected layer was of the same order. This surface compressive stress, combined with the smoother surface and reduction in machining flaws, is thought to be responsible for the enhancement of the flexural strength seen for the AJM samples.…”

Section: Resultsmentioning

confidence: 48%

Surface Finishing of Alumina Ceramics by Means of Abrasive Jet Machining

Wakuda

Yamauchi

Kanzaki

2002

Journal of the American Ceramic Society

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Abrasive jet machining (AJM) is proposed as a new approach to surface finishing of structural ceramics. The effect of AJM on the material removal behavior of a commercially available alumina ceramic, and its effect on mechanical properties, was characterized and compared with identical material subjected to conventional finishing processes. Conventional grinding of the ceramic resulted in a surface that was dominated by intergranular fracture, whereas, during AJM, impact by the abrasives led to material removal in a manner resembling ductile behavior, and the resulting surface appearance was much smoother. A significant improvement in flexural strength was attained, compared with the strength of both the ground and lapped samples, because of an induced compressive residual stress.

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Section: Resultsmentioning

confidence: 48%

Surface Finishing of Alumina Ceramics by Means of Abrasive Jet Machining

Wakuda

Yamauchi

Kanzaki

2002

Journal of the American Ceramic Society

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“…The fracture toughness and hardness of the target materials are critical parameters affecting the material removal rate in AAJM process of engineering ceramics. In the case of Z r O 2 , the erosion rate was almost independent of the abrasive hardness, but for the other ceramic materials (Al 2 O 3 ,S i C, Si 3 N 4 ), there were marked declines in the erosion rate when the hardness of the abrasive approached that of the materials [13]. The effect of nozzle pressure has been researched, which indicates that after a pressure, the MRR and penetration ratesincrease with the nozzle pressure.…”

Section: Studies On the Process Of Aajmmentioning

confidence: 96%

“…The surface roughness R a of glass in relation to the average particle diameter of abrasive, R a is 0.4 µm ~ 1.3 µm when the particle diameter is between 8 µm to 40 µm, a can reach to 0.02 µm if superior grade powder is used. The effect of AAJM on the mechanical properties of the workpiece whether or not it results in any strength degradation should be carefully taken into consideration, but no strength degradation took place for the AAJM of ceramics surface (damage-free) by comparing the lapping samples and AAJM samples with the 4-point bending test [8][9][10][11][12][13].…”

Section: Studies On the Process Of Aajmmentioning

confidence: 99%

Present Situation and Developing Trend of Abrasive Air Jet Micromachining

Yan

Zhang

2004

KEM

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“…One of the practical applications of the MAJM process is decorating or texturing brittle materials. For instance, window glass and mirrors, where the engraved holes provide an optical effect on the surface [5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nozzle Type and Abrasive on Machinablity in Micro Abrasive Air Jet Machining of Glass

Fan

Wang

et al. 2007

KEM

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Micro abrasive jet machining (MAJM) is a high effective economical technology for three dimensional micro structure fabrications of brittle materials. It is widely used in the fabrication of semiconductors, electronic devices, micro electro-mechanical systems (MEMS), optical-electronic and optical devices, and medical instruments. In this paper, based on the experimental study of MAJM for glass, the influences of the nozzle type/size and abrasive type on the material erosion rate and structure profile are analyzed. The results show that the rectangular nozzle can yield a more accurate and efficient machining performance due to reduced flux effect. By contrast, with round nozzle all the cross section profiles of the machined patterns show rounded V-type shape. The rectangular nozzle is able to produce geometry with flat shape. The machining area is almost independent of the abrasive hardness, and the erosion rate increases with the increase in the hardness of the abrasive grits. The nozzle geometry is of great importance for machining accuracy and the efficiency.

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Characteristics of Abrasive Jet Machining of Silicon Nitride Ceramic.

Cited by 4 publications

References 0 publications

Surface Finishing of Alumina Ceramics by Means of Abrasive Jet Machining

Surface Finishing of Alumina Ceramics by Means of Abrasive Jet Machining

Present Situation and Developing Trend of Abrasive Air Jet Micromachining

Effect of Nozzle Type and Abrasive on Machinablity in Micro Abrasive Air Jet Machining of Glass

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