نتایج جستجو برای: grinding effect

تعداد نتایج: 1648431  

Journal: :Brazilian dental journal 2010
Ufuk Işerı Zeynep Ozkurt Ender Kazazoğlu Davut Küçükoğlu

The surface of zirconia may be damaged during grinding, influencing the mechanical properties of the material. The purpose of this study was to compare the flexural strength of zirconia after different grinding procedures. Twenty bar-type zirconia specimens (21 x 5 x 2 mm) were divided into 4 groups and ground using a high-speed handpiece or a low-speed straight handpiece until the bars were re...

B. Rezai M. Noaparast M.A. Babai Alamouti

This study was conducted in Mouteh grinding circuit. Mouteh gold processing plant is located in Esfahan province,center of Iran, close to Mouteh open pit mine. One of the main problems in this circuit is low efficiency grinding operation. In this study, first grinding circuit and its performance parameters are evaluated. Laboratory and corrected operating Bond work index subsequently were calcu...

Journal: :Journal of dairy science 2000
F San Emeterio R B Reis W E Campos L D Satter

This study evaluated the effect of coarse or fine grinding of three forms of corn on the performance of lactating cows. Six diets, fed as total mixed rations, were identical except for the corn portion of the diet. Corn treatments were dry shelled corn, high moisture ensiled ear corn, and high moisture ensiled shelled corn, either coarsely or finely ground. The experimental design was a 6 x 6 L...

2018
Amm Sharif Ullah Alessandra Caggiano Akihiko Kubo M A K Chowdhury

Grinding is one of the essential manufacturing processes for producing brittle or hard materials-based precision parts (e.g., optical lenses). In grinding, a grinding wheel removes the desired amount of material by passing the same area on the workpiece surface multiple times. How the topography of a workpiece surface evolves with these passes is thus an important research issue, which has not ...

Journal: :Brazilian dental journal 2016
Gabriela Scatimburgo Polli Gabriel Rodrigues Hatanaka Filipe de Oliveira Abi-Rached Lígia Antunes Pereira Pinelli Márcio de Sousa Góes Paulo Francisco Cesar José Maurício Dos Santos Nunes Reis

This study evaluated the effect of grinding protocols and resintering on flexural fatigue limit and surface characterization of LavaTM Y-TZP. Bar-shaped specimens (20×4.0×1.2 mm, n=40; 20×4.0×1.5 mm, n=80) were obtained. Half of the thinner specimens (1.2 mm) constituted the as-sintered group (AS), while the thicker ones (1.5 mm) were ground with diamond burs under irrigation (WG) or not (G). T...

2017
Zixin Yin Yuxing Peng Zhencai Zhu Zhangfa Yu Tongqing Li

The impact behavior between the charge and lifter has significant effect to address the mill processing, and is affected by various factors including mill speed, mill filling, lifter height and media shape. To investigate the multi-body impact load behavior, a series of experiments and Discrete Element Method (DEM) simulations were performed on a laboratory-scale mill, in order to improve the g...

Journal: :Epitoanyag - Journal of Silicate Based and Composite Materials 2005

2008
A. Brosse H. Hamdi J-M. Bergheau

The grinding process consists of an abrasive contact between a moving workpiece and a wheel in rotation [1]. Because of the grinding power converted into heat at the interface, high temperatures can appear that can lead to thermal, mechanical or metallurgical consequences. Each of these effects has been fully related in literature by authors. Guo presents a good review of surface layers (dark, ...

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