Ceramic joints

A. M. Rajendran and W. H. Cook, "A Comprehensive Review of Modeling of Impact Damage in Ceramics," Joint report between the University of Dayton Research and the Air Force Armament Eaboratory, AFATL-TR-88-143 SBI-AD-E801 843, 99 pp., Dec. 1988. 

Suganuma, K., Nihara, K., Fujita, T. and Okamoto, T., Conf. Proc. Advanced Materials, Vol. 8, Metal Ceramic Joints, Tokyo, 1988, MRS, Pittsburg, USA (1988)... 

Fig. 15. A low contamination vacuum brazing furnace for brazing laige metal-to-ceramic joints 1, valve, open (—) and shut (-) 2, LN trap 3,...

Successful ceramic/ceramic joints between both similar and dissimilar ceramic materials have been achieved both i) by layering materials in the green state, then firing,and ii) by joining fully dense materials (Fig. 8). In some instances, microwave... 

The DB-procedure was optimised in respect with the kinetic requirements and the high-temperature mechanical properties of the Ni-superalloy. From the kinetic point of view, the bonding temperature should be over 1000°C when alumina and transition metals are directly bonded [6]. The bonding procedure was always carried out in high vacuum, better than 2-10 mbar (0.2 mPa). The typical thermal and axial compression cycles are presented in Fig.la. It was experimentally found that the ambient bonding temperature is 1100"C or less due to the fast creep of the superalloy beyond this. The compression for the tests was selected as 10 MPa in ceramic-metal joints and 20 MPa in ceramic-ceramic joints [6]. 

T. Suga, K. Mizuno and K. Miyazawa, "Thermal Stresses in Ceramic-to-Metal Joints" pp. 137-142 in Metal-Ceramic Joints, Proc. MRS International Meeting on Advanced Materials, Vol. 8. Edited by M. Doyama, S. Somiya and R. P. H. Chang. Materials Research Society, Pittsburgh, PA, 1989. 

The natural hip joint, like the shoulder joint, consists of a ball-and-socket connection. Many combinations of materials have been tried for this and other joints. In general metal-metal joints are unsatisfactory because of high corrosion and friction that result in joint immobilization. All ceramic joints often fracture too readily, and all plastic joints usually lack strength in at... 

Polymer pyrolysis is also very flexible regarding the type of component that can be obtained fibers, films, membranes, foams, ceramic/ceramic joints, ceramic matrix composites, and monolithic bodies can all be fabricated. The present study has been focused on the formation of monolithic component and thin ceramic films. 

Similar to the ceramic-ceramic joints, the constitutive response of the base zirconia, cast iron, and braze metal were determined in order to predict joint response based on stress-strain properties of the constituent materials. Tensile tests were performed on cast iron and Incusil-ABA, while bend tests were performed on the base zirconia. The temperature of testing ranged from room temperature to 400 C, the upper temperature limit for this type of joint. The strength and toughness of joints were evaluated using unnotched and notched bend bars and disk specimens. 

Fracture Mechanics Assessment of Metal Ceramic and Ceramic-Ceramic Joints", by... 

Shown here is a hip replacement device with an alumina ceramic joint head. 

Typical Use Glazing (primer for glass ceramics) Joints seals (gas Typical Use Most building materials (glass, aluminium profiles, GRP). ... 

Wear of Alumina/Zirconia Nano-composite for Ceramic/Ceramic Joint Prostheses... 

Wear of alumina/zirconia nano-composite for ceramic/ceramic joint prostheses... 

Wear properties of alumina, zirconia and alumina/zirconia nano-composite ceramics were investigated with two types of wear apparatus. An end face apparatus was used to measure wear between flat surfaces in distilled water. Results show that wear of alumina is lower than that of zirconia under poor lubrication conditions. According to the observed wear surfaces, adhesion and micro-ploughing are the major wear mechanism for zirconia. The wear rate under concentrated contact pressure was measured with a sphrae on flat apparatus in bovine serum solution. In contrast to the former test, alumina shows higher wear rate than zirconia due to micro-cracking. Wear of alumina/zirconia nano-composite ceramic is lower than alumina and zirconia monolithic ceramics during both tests. In other words, the nano-composite ceramics shows higher wear resistance irrespective of lubrication conditions and contact pressure. It is concluded that the alumina/zirconia nano-composite ceramics have excellent properties for ceramic/ceramic joint prostheses. 

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