Particulate Loading of High Temperature Brazes for Joining Engineering Ceramics

2012 ◽  
pp. 101-118
Author(s):  
K.M. Knowles ◽  
D.R. Ormston ◽  
D.B. Conquest ◽  
L.J. Ecclestone ◽  
J.A. Fernie
Keyword(s):  
High Temperature ◽  
Engineering Ceramics

High-Temperature Engineering Ceramics

2014 ◽  
pp. 169-190
Author(s):  
Ronald J. Kerans ◽  
Allan P. Katz
Keyword(s):  
High Temperature ◽  
Engineering Ceramics

High Temperature Dielectric Property Measurements - An Insight into Microwave Loss Mechanisms in Engineering Ceramics

1994 ◽  
Vol 347 ◽  
Author(s):  
J. G. P. Binnen ◽  
T. E. Cross ◽  
N. R. Greenacre ◽  
M. Naser-Moghadasi
Keyword(s):  
High Temperature ◽  
Dielectric Property ◽  
Microwave Dielectric Property ◽  
Elevated Temperatures ◽  
Engineering Ceramics ◽  
Microwave Dielectric ◽  
Wide Range ◽  
Microwave Loss ◽  
Effect Of Impurities ◽  
Loss Mechanisms

ABSTRACTIt is now possible, in a number of laboratories worldwide, to make microwave dielectric property measurements at temperatures up to about 1500°C. These measurements have shown that the loss tangent, tanδ, of a wide range of engineering ceramics increases dramatically at elevated temperatures. The interaction between the ceramic material and the impurities present during processing can have a dramatic effect on both the ease with which the material is able to extract energy from the microwave field and on the properties of the final ceramic. While the effect of impurities on the ceramic properties is relatively well understood the effect of impurities on the microwave loss mechanisms at elevated temperatures is not. This paper will review some of the recent work on the high temperature microwave dielectric property measurements performed at Nottingham.

The Influence of the Technical Parameters on the Quality of Engineering Ceramics by Abrasive Waterjet

2013 ◽  
Vol 416-417 ◽  
pp. 1689-1692
Author(s):  
Feng Lian Zhang ◽  
Jing Zhu
Keyword(s):  
High Temperature ◽  
High Hardness ◽  
Abrasive Waterjet ◽  
Engineering Ceramics ◽  
Wear Resistant ◽  
Technical Parameters ◽  
Machining Quality ◽  
Conventional Machining

Engineering Ceramics is a inorganic nonmetal material, which is sintered at high-temperature. ceramics have promising potential as high-temperature strength.erosion-resistant, wear-resistant and hot impact-resistant.However, because they have high hardness and brittleness as well as nonconductive, it is very difficult to machine them using conventional machining. Their use-area is restricted. At presently, the machining technology of Engineering Ceramics by abrasive waterjet become more and more important for humankind. In this paper, the influence of technical parameters on machining quality has been studied and analyzed. A better changing method of technical parameters is given.

Research on Mechanism of Ultra-Precision Electrical Discharge and Mechanical Grinding for Nonconductive Engineering Ceramics

2007 ◽  
Author(s):  
Renjie Ji ◽  
Yonghong Liu ◽  
Lili Yu ◽  
Xiaopeng Li
Keyword(s):  
High Temperature ◽  
Service Life ◽  
Electrical Discharge ◽  
High Heat ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Knife Edge ◽  
Mechanical Grinding ◽  
Engineering Ceramics ◽  
Ultra Precision

A new method known as electrical discharge and grinding with synchronous servo double electrodes (EDGSSDE) is presented in this paper for nonconductive engineering ceramics which integrates electrical discharge and mechanical grinding with a metal bonded diamond conductive wheel. Also the mechanism of this method is analyzed. The results show that electrical discharge and electrolysis occur simultaneously during the process, which makes the diamond grains always in knife-edge, and achieves in-process dressing of grinding wheel. Due to the effects of high temperature and high heat generated by electrical discharge, a metamorphosed layer is formed on the surface of ceramics, which debases the rigidity of workpiece. The conductive grinding wheel grinds the metamorphosed layer and achieves paucity of ceramics removal by minute fritter. This method can dress grinding wheel in-process, avoid micro-crack that produced in traditional engineering grinding, reduce the grinding force, improve the service life of grinding wheel, advance the surface quality and machine nonconductive engineering ceramics in ultra-precision.

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