Results 231 to 240 of about 6,625,966 (272)

In-vitro strength degradation of dental ceramics and novel PICN material by sharp indentation

Journal of the Mechanical Behavior of Biomedical Materials, 2013
To determine the flexural strength and subsequent strength degradation of a range of dental CAD/CAM ceramic materials and novel PICN (Polymer-Infiltrated-Ceramic-Network) materials by means of pre-damaging with Vickers indentations at various loads.The materials tested included (Mark II, PICN test material 1 and 2, In-Ceram Alumina, VM 9, In-Ceram YZ ...
Michael Swain
exaly   +3 more sources

Degradation of Ceramic Materials in Physiological Media

1979
The literature apropos of the degradation of ceramics and ceramic-coated metal systems in physiological media is reviewed. Both in vitro and in vivo studies are involved. Generally, ceramics suffer losses of mechanical strength with time in physiological media, and ceramic-metal bonds lose adherence. Carbons seem to be exceptions to this rule.
JL Drummond, MR Simon, SD Brown
exaly   +2 more sources

Estimating the erosion and degradation performance of ceramic and polymeric insulator materials in high current arc environments

IEEE Transactions on Magnetics, 1991
Modeling the erosion and holdoff degradation performance of various commercially available polymeric and ceramic insulators is addressed. The insulators are tested on a surface discharge switch at approximately 300 kA in atmospheric air. Test diagnostics include the surface voltage holdoff recovery and the eroded mass loss of the insulator and ...
T G Engel
exaly   +2 more sources

In vitro degradation and cell response of calcium carbonate composite ceramic in comparison with other synthetic bone substitute materials

Materials Science and Engineering C, 2015
The robust calcium carbonate composite ceramics (CC/PG) can be acquired by fast sintering calcium carbonate at a low temperature (650 °C) using a biocompatible, degradable phosphate-based glass (PG) as sintering agent. In the present study, the in vitro degradation and cell response of CC/PG were assessed and compared with 4 synthetic bone substitute ...
Fanwen Yang, Fupo He, Jixiang Zhu
exaly   +3 more sources

Evaluating the effect of increasing ceramic content on the mechanical properties, material microstructure and degradation of selective laser sintered polycaprolactone/β-tricalcium phosphate materials

Medical Engineering and Physics, 2015
Orthopaedic scaffold materials were fabricated from polycaprolactone (PCL) and composite PCL-β-tricalcium phosphate (PCL/β-TCP) powders using selective laser sintering (SLS). Incorporating β-TCP particles is desirable to promote osteogenesis. The effects of increasing β-TCP content on the material's mechanical properties and microstructure were ...
Stefan Lohfeld, Peter E. McHugh, Heather Doyle   +2 more
exaly   +3 more sources

dc-Electrical Degradation of the BT-Based Material for Multilayer Ceramic Capacitor with Ni internal Electrode: Impedance Analysis and Microstructure

Japanese Journal of Applied Physics, 2001
The impedance of a BaTiO3 (BT)-based multilayer ceramic capacitor with a nickel internal electrode (Ni-MLCC) was investigated by measuring the frequency domain at various temperatures. All the obtained impedance data could be successfully fitted to a 4-RC section electrical equivalent network.
Hiroshi Kishi, Hirokazu Chazono
exaly   +2 more sources

Photocatalytic Degradation of Pollutants Using Advanced Ceramics: Materials, Mechanism, Synthesis, and Applications

Journal of Inorganic and Organometallic Polymers and Materials
Kawaljit Singh Randhawa
exaly   +2 more sources

Degradation/Alteration of Ceramic Lining Materials in Corrosive Environments

CORROSION 1986, 1986
Abstract Specific cases of the degradation/alteration of ceramic lining materials in highly corrosive industrial processing environments are discussed. Examples drawn from experiences in acid production, hydrometallurgy, wood pulp plants, chemical plants, power plants and others are reviewed.
R. R. Pierce, C. E. Semler
openaire   +1 more source

Radiation-induced electrical degradation of ceramic materials: an artefact?

Journal of Nuclear Materials, 1993
Recently three experimental groups around Hodgson [1,2], Pells [3], and Shikama [4] have reported a phenomenon in irradiated ceramics, called radiationinduced electrical degradation (RIED). Their experimental results suggest that ceramic materials suffer a permanent loss of their electrically insulating ability after exposure to low doses of ...
W. Kesternich, F. Scheuermann, S.J. Zinkle   +2 more
openaire   +1 more source

Strength degradation and failure limits of dense and porous ceramic membrane materials

Journal of the European Ceramic Society, 2013
Abstract Thin dense membrane layers, mechanically supported by porous substrates, are considered as the most efficient designs for oxygen supply units used in Oxy-fuel processes and membrane reactors. Based on the favorable permeation properties and chemical stability, several materials were suggested as promising membrane and substrate materials: Ba
G. Pećanac, S. Foghmoes, M. Lipińska-Chwałek, S. Baumann, T. Beck, J. Malzbender   +5 more
openaire   +1 more source