12 Result(s)
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Article
Effect of the dehydrogenation speed and Nd content on the microstructure and magnetic properties of HDDR processed Nd-Fe-B magnets
The effect of Nd content and dehydrogenation speed on the microstructure and magnetic properties of hydrogenation-disproportionation-desorption-recombination (HDDR) processed Nd-Fe-B magnetic powders was studi...
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Article
Analysis of the small punch creep test results according to the normalized lifetime fraction
The small punch creep test method was developed to complement the demerits of the existing uniaxial creep test method. A 10×10×0.5mm thin-plate specimen was used in the test, which could help save specimens an...
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Article
Effects of temperature and catalysts on the synthesis of carbon nanotubes by chemical vapor deposition
Carbon nanotubes were produced on a quartz plate and a silicon wafer by chemical vapor deposition using xylene as a carbon resource, iron and cobalt as catalysts, and ammonia as a reactive gas. A series of exp...
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Article
Creep-fatigue damage and life prediction in P92 alloy by focused ultrasound measurements
In the present study, the characteristics of creep damage in P92 alloy were investigated via nondestructive evaluation. Generally, as the hold time of a static load increases, the degradation of the material b...
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Article
Carbon nanotubes grown over Fe−Mo−Mg−O composite catalysts
High quality, high yield carbon nanotubes were synthesized on a composite catalyst using catalytic chemical vapor deposition. The composite catalysts Fe/MgO, Mo/MgO and (Fe, Mo)/ MgO, prepared via the solgel m...
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Article
Effects of ammonia in catalytic chemical vapor deposition in the synthesis of carbon nanotubes
Chemical vapor deposition with xylene as the carbon resource, a nitrate iron solution as the catalyst, and ammonia gas as the reduction gas was used to investigate the different parameters that influence carbo...
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Article
Bonding of urethane reactants to aluminum surface
Reaction mechanism of urethane components (phenyl isocyanate and isopropanol) on Al hydroxide surface was studied using molecular modeling, and compared with real systems by measurement of electrochemical pote...
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Article
Fatigue crack growth behavior of heat affected zone in P92 steel weldment
In this study, the effect of microstructure on fatigue crack growth behavior of HAZ was investigated using newly developed P92 steel weldment. Fatigue crack growth rates of the fusion line and fusion line+2 mm...
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Article
Effect of temperature on fatigue crack growth in P92 steel
Fracture at high temperature has become a critical problem for such high temperature components as those used in power plants or oil refinery plants, because both high operating temperature and pressure are re...
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Article
Effects of filler and ethanol on mechanical properties of glass-like carbon
The effects of filler and ethanol on the mechanical properties of glass-like carbon were studied. The specific gravities of glass-like carbons with the filler were higher than those of alcohol added glass-like...
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Article
A study of creep-fatigue life prediction using an artificial neural network
In this study, using AISI 316 stainless steel, creep-fatigue tests were carried out under various test conditions (different total strain ranges and hold times) to verify the applicability of the artificial ne...
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Article
Enhanced mesophase formation of petroleum pitch by polyaromatic hydrocarbon addition
Enhanced mesophase yield was achieved for A-240 pitch by addition of aromatic hydrocarbon compounds (anthracene and acenaphthylene) as nucleating agents. A-240 pitch was acid/solvent extracted prior to adding ...
