New Production Route for Vanadium Nitride Master Alloy: Experimental and Thermodynamic Analysis

Author(s):  
Arijit Biswas ◽  
Chandan Sahoo ◽  
Wei-Tong Du ◽  
In-Ho Jung ◽  
Manas Paliwal
1992 ◽  
Vol 128 (1) ◽  
pp. 201-205 ◽  
Author(s):  
Heinz Schmitt ◽  
Mordehay Adam

2014 ◽  
Vol 625 ◽  
pp. 298-305 ◽  
Author(s):  
Takashi Goshima ◽  
Keisuke Ikeda ◽  
Kenta Fukudome ◽  
Kei Mizuta ◽  
Shuji Mitsuyoshi ◽  
...  

To establish a new production route of biomass-derived BTX and propylene, the catalytic conversion of oxygen-containing intermediates which are furfural, levulinic acid, acetic acid or butyric acid, obtained by hydrothermal reactions of bagasse or fermentation of molasses was investigated with zeolites, ZSM-5, SAPO-11 and SAPO-34. Levulinic acid and acetic acid were suitable for generating BTX with ZSM-5. On the other hand, the butyric acid was valuable for converting to chemical raw materials with ZSM-5. By using SAPO-11 as the catalyst, butyric acid converted to propylene at high yields. The yield for propylene was the maximum value 58.8C% at 723K, especially the ratio of propylene to gaseous hydrocarbon products increased up to 90.4C%.


2012 ◽  
Vol 577 ◽  
pp. 43-46
Author(s):  
Ding Guo Zhao ◽  
Xiao Jie Cui ◽  
Shu Huan Wang ◽  
He Jun Zhang

The thermodynamic analysis shown that oxygen content in master alloy is very low, so other alloy elements content which are balance to oxygen are relatively high. In the amorphous master alloy, deoxidizing capacity of silicon is stronger than boron, and with process of decrease of the temperature, oxygen content decrease. The silicon in the master alloy can also take off the oxygen content below 1 ppm. Denitrification capacity of boron is stronger than silicon, and with process of decrease of the temperature, nitrogen content decrease. The boron in the master alloy can also take off the nitrogen content below 4 ppm. All of the research are based on energy materials and it will be useful for the development for energy saving.


2007 ◽  
Vol 280-283 ◽  
pp. 1139-1142
Author(s):  
Sainbaatar ◽  
Zuo Tai Zhang ◽  
Wen Chao Li ◽  
Xi Dong Wang

Aluminium oxynitride-vanadium nitride (AlON-VN) composite ceramic was fabricated based on thermodynamic analysis of V-Al-O-N systems. The results indicated that the VN dispersed homogeneously in AlON matrix and can reinforce AlON matrix. Oxidation behavior was studied and the results showed that it belongs to self-protective oxidation due to the good adherence of oxidation product. Therefore, AlON-VN composites have excellent oxidation resistance.


2014 ◽  
Vol 59 (4) ◽  
pp. 1327-1330
Author(s):  
J. Borowiecka-Jamrozek

Abstract This paper presents results of investigations of WC-12%Co and WC-17%Co coatings detonation sprayed on a sintered cobalt substrate. The main objective of the present work was to establish a new production route of sandwich type diamond-impregnated segments for circular sawing of stone and other construction materials. Unalloyed cobalt was chosen as the substrate material. Prior to coating the specimens were made by means of hot pressing of Extrafine cobalt powder in a graphite mould. The segments were then coated with WC-Co. The effects of the coating process on the thickness, microhardness, microstructure and wear resistance of the deposits were investigated. The properties of the coatings were established by performing the following tests: a microstructure analysis, a point analysis of chemical composition and a linear analysis, a phase composition, a microhardness tests and abrasion resistance.


2018 ◽  
Vol 22 (3) ◽  
pp. 822-832 ◽  
Author(s):  
J Pinto ◽  
J Escudero ◽  
E Solórzano ◽  
MA Rodriguez-Perez

A comprehensive study about a new production route of structural polymer foams is presented. This methodology is based on the one hand on a free foaming process induced by a chemical blowing agent inside a closed mold, and on the other hand on the use of a solid polymer able to absorb gas in close contact with the molten foamed polymer, establishing a competitive absorption of the blowing gas between both materials. This competitive absorption of the gas promotes the formation of a solid skin in all the areas in contact with the solid polymer. This phenomenon has been identified in-situ and evaluated in real time using a specific X-ray radioscopy set-up, being possible to relate unequivocally the apparition and thickness of the solid skin with the presence of the solid polymer and with the pressure achieved in the closed mould during the foaming process. The presented production route shows an accurate and independent control of the final foam relative density (even below 0.5) and the thickness of the solid skin, together with an excellent surface quality and a broad applicability, which allows the design and production of structural polymer foams with exceptional features.


2014 ◽  
Vol 10 (4) ◽  
pp. 511-524 ◽  
Author(s):  
Marcelo R. Pagnola ◽  
Mariano Malmoria ◽  
Marcelo Barone ◽  
Hugo Sirkin

Purpose – The purpose of this paper is to present a ribbons production route of composition Fe78Si9B13 (%at.) using low cost noncommercial scrap materials to obtain usable magnetic cores by melt spinning technique and their characterization. This way, these may compete with the materials produced by conventional casting processes. Design/methodology/approach – The methodology is to design a master alloy with scrap different starting compositions, to which Fe is added to get the desired atomic ratio of components. With this starting alloy, using the method of melt spinning, in its variant of chill block melt spinning, are achieved amorphous ribbons with desired soft magnetic behavior. Then these ribbons are thermally treated for achieve nanocrystalline structures to improve the performance in the magnetic cores. Findings – The result of this paper shows that it is possible to recycle scrap materials, and re-used efficiently as components essential in part of electrical components. This way, these may compete with the materials produced by conventional casting processes. Research limitations/implications – The limitation of this work to ensure that the scrap materials used is reasonably adequate to accomplish obtaining the master alloy, i.e. having reduced impurities. Practical implications – The implications are important, because it assures that the components are recyclable and also high-tech in reference to energy saving that involves the production of amorphous and nanocrystalline materials in the electric industry. These products may compete with those produced by conventional casting processes. Social implications – The social implications lead to awareness in recycling and energy saving as an option for social progress in technology. Originality/value – The originality of the study is that it takes as a starting point for the final product (ribbon) noncommercial scrap materials of known composition and the obtained results are comparable to those that also are manufactured from the pure elements. The control of impurities is necessary in the production route. This way, these may compete with the materials produced by conventional casting processes. This process achieved a production with lower cost, high efficient energy products and high added value.


2001 ◽  
Vol 268 (6) ◽  
pp. 1554-1560 ◽  
Author(s):  
Reinskje Talhout ◽  
Jan B. F. N. Engberts

1962 ◽  
Vol 41 (9) ◽  
pp. 545
Author(s):  
Mountford ◽  
H.G. Gregory ◽  
D.M. Anthony ◽  
D.A. Fairnie ◽  
E.B. Carter ◽  
...  

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