نتایج جستجو برای: copper alloy
تعداد نتایج: 133138 فیلتر نتایج به سال:
هدف از تحقیق حاضر بررسی اثر پارامترهای فرآیند انجمادسریع نظیر فوق ذوب و سرعت چرخ تبریدی و همچنین تاثیر عناصر آلیاژی al(5/1 درصد اتمی ) و ge (1درصد اتمی ) بر ریز ساختار، خواص مغناطیسی و سینتیک فرآیند تبلور سیستم آلیاژی fe si-b-nb-cu بوده است بر همین اساس آلیاژهایی با ترکیب fe si-b-nb-cu و همچننی fe si-b-nb-cu تهیه و با استفاده از فرآیند انجمادسریع و به وسیله دستگاه چرخ مذاب در شرایط مختلف از ف...
In this paper, we report the in situ growth of Ni(x)Cu(1-x) (x = 0, 0.25, 0.50, 0.75 and 1.0) alloy catalysts to anchor and decorate a redox-reversible Nb1.33Ti0.67O4 ceramic substrate with the aim of tailoring the electrocatalytic activity of the composite materials through direct exsolution of metal particles from the crystal lattice of a ceramic oxide in a reducing atmosphere at high tempera...
Sb based alloy nanostructures have attracted much attention due to their many promising applications, e.g. as battery electrodes, thermoelectric materials and magnetic semiconductors. In many cases, these applications require controlled growth of Sb based alloys with desired sizes and shapes to achieve enhanced performance. Here, we report a flexible catalyst-free chemical vapor deposition (CVD...
The purpose of this paper is to optimize the EDM parameters to get the better surface finish on the Titanium alloys Ti6AL4V. The continuous advancement of the alloy is fulfilling the demand of the industry but for advance material like Titanium alloys Ti6AL4V partially adopted by industries cause of the difficulties in machining. Non Conventional machining process like Spark Erosion Electrical ...
Bunched and multi-circularly wrapped carbon nanotubes (CNT) are observed to grow on alloy substrates based on iron group metals and copper by a microwave enhanced hot-filament method with a dilute gas of ammonia at a proper RF self-bias. The grown size of CNTs embodied in the grain sizes of conducting bulk alloy catalysts such as Cu-Ni, Cu-Fe, Cu-Co, and Cu-Ni-Fe-Co are controlled by a precurso...
BACKGROUND The nuclear weapons industry has long been known as a source of beryllium exposure. METHODS A total of 1,004 former workers from a nuclear weapons assembly site in the Midwest were screened for sensitization to beryllium (BeS). The screenings were part of the Department of Energy (DOE) Former Worker Program established in 1996. RESULTS Twenty-three (2.3%) workers were found sensi...
Metal membranes play a vital role in hydrogen purification. Defect-free membranes can exhibit effectively infinite selectivity but must also provide high fluxes, resistance to poisoning, long operational lifetimes, and low cost. Alloying offers one route to improve on membranes based on pure metals such as palladium. We show how ab initio calculations and coarse-grained modeling can accurately ...
The glass-forming ability (GFA) and thermal stability of (Zr65Al7:5Cu27:5)100 xTix (x 1⁄4 0 15; in at%) alloys have been investigated. It was revealed that a certain amount of Ti addition could improve the GFA of Zr65Al7:5Cu27:5 alloy effectively. The best bulk metallic glass (BMG) forming composition was found at (Zr65Al7:5Cu27:5)93Ti7. Bulk glassy samples with diameter of 7mm were made by mea...
There are several benefits in using adhesive technique in removable prosthodontics as well as fixed prosthodontics. Previous studies have examined denture-base surface treatments that improve bond strength between a denture base resin and autopolymerizing repair resin. Dichloromethane and ethyl acetate are organic solvents that swell the denture base surface, thereby permitting diffusion of the...
MECHANICAL PROPERTIES OF COPPER-NICKEL-TITANIUM ORTHODONTIC WIRES Margaret Rosen, D.M.D. Marquette University, 2016 Introduction: The initial phase of orthodontic therapy relies on flexible wires, usually composed of a nickel-titanium alloy, to apply a substantially constant load during tooth movement. Copper has been added to nickel-titanium archwires, resulting in an alloy with potential clin...
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