Strength of functionally gradient composite hemispherical bearings

2006 ◽  
Vol 74 (2) ◽  
pp. 145-152 ◽  
Author(s):  
Seung Min Lee ◽  
Dong Chang Park ◽  
Byung Chul Kim ◽  
Dai Gil Lee
Keyword(s):  
Functionally Gradient ◽  
Functionally Gradient Composite

Centrifugal casting processes of manufacturing in situ functionally gradient composite materials of Al-19Si-5Mg alloy

Rare Metals ◽  
2009 ◽  
Vol 28 (4) ◽  
pp. 405-411 ◽  
Author(s):  
Yong Xie ◽  
Changming Liu ◽  
Yanbo Zhai ◽  
Kai Wang ◽  
Xuedong Ling
Keyword(s):  
Composite Materials ◽  
Centrifugal Casting ◽  
Functionally Gradient ◽  
Functionally Gradient Composite

Wear Analysis of Functionally Gradient Composite Materials by FE Modelling of Microhardness Measurements and Wear Tests

2007 ◽  
Vol 537-538 ◽  
pp. 519-526
Author(s):  
David Felhös ◽  
Karoly Váradi ◽  
Klaus Friedrich
Keyword(s):  
Wear Behavior ◽  
Gradient Material ◽  
Material Structure ◽  
Fe Modelling ◽  
Sem Images ◽  
Wear Analysis ◽  
Functionally Gradient ◽  
Sic Reinforcement ◽  
Wear Tests ◽  
Functionally Gradient Composite

Rollers of three different material structures were examined: rollers consisting of pure EP resin; homogeneous EP/SiC composite rollers containing 5 vol.% SiC; and EP/SiC composite rollers with functionally gradient (FG) material structure. Wear tests were performed on the rollers. The wear tests showed that rollers of gradient structure are the most wear-resistant of all. Microhardness measurements were performed on the materials of the three different rollers. SEM images were made of the surface of wear traces. In order to get to know better the effect of SiC reinforcement particles on the wear mechanism, microhardness measurements were simulated by 3D FE micro-models. The SEM images and the FE models were used to explain the excellent wear behavior of the tread of rollers with gradient material distribution.

Micro-observation and characterization of bonding between bone and HA-glass-titanium functionally gradient composite

Biomaterials ◽  
1991 ◽  
Vol 12 (2) ◽  
pp. 225-230 ◽  
Author(s):  
S. Maruno ◽  
H. Itoh ◽  
S. Ban ◽  
H. Iwata ◽  
T. Isikawa
Keyword(s):  
Functionally Gradient ◽  
Functionally Gradient Composite

Fabrication and Characterization of a Functionally Gradient Mo-MoSi2 Composite

1993 ◽  
Vol 322 ◽  
Author(s):  
Gaurav Agarwal ◽  
Wen-Yi Lin ◽  
Robert. F. Speyer
Keyword(s):  
Gradient Material ◽  
Reaction Products ◽  
Reducing Atmosphere ◽  
Functionally Gradient ◽  
Cyclic Heat ◽  
Cte Mismatch ◽  
Fabrication And Characterization ◽  
Mosi2 Composite ◽  
Functionally Gradient Composite

AbstractFor the application of immersed combustion-radiant tubes in glass melters, a Mo-MoSi2 functionally gradient composite was developed. A gradient profile mixture with varying amounts of powders of these two compounds was hot pressed at 1650°C and 17.4 MPa. Mo5Si3, and Mo3Si reaction products were detected by XRD in the hot pressed composite. Limited cracking was apparent in regions where pure Mo regions applied tensile stresses to regions rich in Mo3Si product. Cyclic heat treatments in a reducing atmosphere showed no signs of further CTE mismatch induced cracking, but did indicate a propensity to creep under load at ∼ 1400°C. A functionally gradient material with MoSi2 on all exterior surfaces showed excellent oxidation protection to the Mo center.

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