refractory metals abstract

FIRST STAGE OF AGGLOMERATION OF IRRADIATED …

 · TY - JOUR. T1 - FIRST STAGE OF AGGLOMERATION OF IRRADIATED HELIUM IN REFRACTORY METALS. AU - Kobayashi, Naoto. PY - 1983/6. Y1 - 1983/6. N2 - Thermal desorption spectrometry has been applied to the study of the agglomeration of irradiated helium in refractory metals - vanadium, niobium, molybdenum and tungsten.

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Refractory Metals | A. Koethe

Download Citation on ResearchGate | Refractory Metals | The definition of “refractory metals” is not unanimous. Often, they are defined as those metals having a melting point in excess of 2200 ...

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Joining of Refractory Metals and its Application

16 · Joining of Refractory Metals and its Application B. Tabernig, N. Reheis PLANSEE SE, Reutte, Austria Abstract In this work fusion and solide state welding techniques for joining PM refractory metals are adressed.

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Refractory Metals | SpringerLink

Abstract. Refractory metals are normally considered to include the relatively small number of metals which are capable of use at very high temperature [1]. There are four refractory metals with commercial applications — molybdenum, tungsten, tantalum and niobium [2].

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Refractory Metals and Alloys | Properties and …

Abstract. All refractory metals, except osmium and iridium, have the highest melting temperatures and lowest vapor pressures of all metals. This Article discusses the commercial applications, and production procedures of refractory metals and alloys. These procedures include fabrication, machining, forming, cleaning, joining, and coatings.

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Refractory Metals and Alloys | Metals Handbook Desk ...

Abstract. The refractory metals include niobium, tantalum, molybdenum, tungsten, and rhenium. They are readily degraded by oxidizing environments at moderately low temperatures. Protective coating systems have been developed, mostly for niobium alloys, to permit their use in high-temperature oxidizing aerospace applications. ...

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Electrodeposition of refractory metals in medium ...

Abstract. Metallic tungsten deposits were obtained by potentiostatic electrolyses in ZnCl NaCl-KCl and ZnCl NaCl-KCl-KF melts containing WCl 4 at 250°C Both the deposits obtained after the electrolysis of three hours were about 0.5 μm of thickness. Addition of KF gave a smooth metal deposit. ... Refractory metals. Electrolysis ...

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Refractory Metals

Refractory metals, molybdenum, tungsten, niobium, tantalum, and rhenium have a number of characteristics in common.They are all BCC metals, and as shown in Figure 1(a), have some of the highest melting points among the elements. Tables 1–4 also show that they have very high densities; of the first four metals niobium has the lowest at 8.57 g cm −3 and tungsten the highest at 19.25 g cm −3.

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The Refractory Metals | The Aeronautical Journal ...

The Refractory Metals - Volume 70 Issue 668 - G. Llewelyn. Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.

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Welding of Reactive and Refractory Metals

24 · Welding of Reactive and Refractory Metals Abstract: Reactive metals have a strong affinity for oxygen and nitrogen at elevated temperatures and when combined form very stable compounds. At lower temperatures they are highly resistant to corrosion. Refractory metals …

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(PDF) Recent advances in aerospace refractory metal …

Recent advances in aerospace refractory metal alloys. ... Refractory metals are prime candidates for many high temperature aerospace components because of their high melting points and inherent ...

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Refractory metals as structural materials for fusion …

Abstract Tungsten is the favoured armour material for plasma facing components for future fusion reactors, but studies examining the use of tungsten or other refractory metals in the underlying cooled structures have historically excluded them, leaving current concepts heavily dependent on copper alloys such as copper chrome zirconium.

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Thermochemistry and the Oxidation of Refractory …

6 · Abstract. Recent developments in the thermochemical data for the condensed oxide phases and volatile oxide species for the refractory metals has made possible an analysis of the several types of high temperature oxidation processes.

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Prospect and retrospect of molten salt electrolysis ...

28 · Abstract: The production of refractory metals and alloys has always been a high energy costs, complex and difficult metallurgical and materials processing process. How to extract the high-value metals and alloys direct from complex refractory metal oxides compounds is a very important and difficult research focus in the fields of modern metallurgy and materials preparation.

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Tungsten2020: Tungsten, Refractory & Hardmaterials …

The 9th International Conference on Tungsten, Refractory & Hardmaterials was held in 2014 and numerous developments have taken place in the intervening years. Remarkable among these has been the explosive development of additive manufacturing (3D printing) using refractory metals …

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Int. Journal of Refractory Metals and Hard Materials

9 · composite refractory materials Jian Chen, Kai Chen, Yan-Gai Liu⁎, Zhao-Hui Huang, Ming-Hao Fang, Jun-Tong Huang School of Materials Science and Technology, China University of Geosciences (Beijing), Beij, PR China article info abstract Article history: Received 27 March 2014 Accepted Available online Keywords ...

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Guide for authors

28 · Before You Begin The entire submission and review process for the International Journal of Refractory Metals and Hard Materials proceeds entirely online using the Elsevier Editorial System, which shortens publication times.. Prior to submitting your paper, please follow the instructions on manuscript preparation given below. Please note that you must have an e-mail address to use the online ...

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Oxidation studies of some refractory metals

18 · Oxidation studies of some refractory metals Abstract Samples of niobium, tantalum, molybdenum and tungsten metals have been given phosphided cases by heating in a phosphorous atmosphere. The samples were subsequently exposed to air at an elevated temperature. In tests at 800°C, the phosphided samples resisted air oxidation markedly compared to ...

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Refractory metals extraction, processing and …

19 · Abstract. This book covers the following topics regarding refractory metals: process flowsheet development; high temperature extraction processes; chemical and thermal processing; electrolytic processing; preparation of ceramic precursors and application of aqueous chemistry to metal recovery; processing and properties.

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International Journal of Refractory Metals & Hard Materials

28 · ABSTRACT The properties of cemented carbides are heavily influenced by the tungsten carbide (WC) powders used in its production. Overall particle size of the WC is most influential, however, in the medium- and coarse-grained ... International Journal of Refractory Metals & Hard Materials 72 (2018) 141–148 Available online 16 December 2017 ...

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Refractory Metals

Home Refractory Metals. ... Abstract: In the scope of this work, 2 mm thick TZM sheet metal is butt welded by electron beam welding (EBW) without filler material and a systematic investigation of the most relevant welding parameters to improve the weld quality is conducted. With the aid of design of experiment (DoE), it is shown that with ...

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Int. Journal of Refractory Metals and Hard Materials

Int. Journal of Refractory Metals and Hard Materials 29 (2011) 608–613 ⁎ Corresponding author at: School of Materials Science & Engineering, Xi'an University of Technology, Xi'an, 710048, PR China.

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Refractory Metals: Tungsten and Tungsten alloys

24 · However, the atomic sizes of these metals are such as to preclude extensive interstitial solution, and they will not be considered. Alloying of tungsten (W) has been relatively less studied than of some of the other refractory metals. Most of the tungsten used thus far in aerospace applications has been in the unalloyed form, which is much ...

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Condensation of refractory metals in asymptotic giant ...

abstract = "The condensation of material from a gas of solar composition has been extensively studied, but less so condensation in the environment of evolved stars, which has been mainly restricted to major compounds and some specific element groups such as the Rare Earth elements. ... Elemental abundance ratios of the refractory metals can ...

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Applications of refractory metals

Abstract A summary of the Technical Conference on Applied Aspects of Refractory Metals, which was sponsored by the Refractory Metals Committee of the Institute of Metals Division of The Metallurgical Society, and was held in Los Angeles on Dec. 10, 1963.

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Refractory metals: A primer | SpringerLink

Abstract. Refractory metals have found wide-spread use in structural, electronic, chemical, and nuclear applications because they display unique physical and mechanical properties over a …

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Magnetic properties of the melt-textured (Nd,Eu,Gd ...

Magnetic data measured on (Nd 0.33 Eu 0.33 Gd 0.33)Ba 2 Cu 3 O y with 35 mol% of Gd (70 nm size), 1 wt% Ag, and 0.1 mol% of TiO 2, Nb 2 O 5, and MoO 3 (all 10 nm grain size) were analyzed. These composites exhibited very high critical current density, qualifying them to be the best candidates for use as bulk superconducting magnets.

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MECHANISM OF ACTIVATED SINTERING OF VI …

T1 - MECHANISM OF ACTIVATED SINTERING OF VI GROUP REFRACTORY METALS. AU - Panin, V. E. AU - Kochepasov, I. I. PY - 1979/1. Y1 - 1979/1. N2 - A mechanism of low-temperature activated sintering of powders with an imperfect structure in the presence of activator additions has been proposed.

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INTERNATIONAL JOURNAL OF REFRACTORY METALS ...

11 · INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,INT J REFRACT MET H,Impact Factor ...

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Refractory metals in space nuclear power (Journal …

31 · Abstract. This article discusses major opportunities for nuclear power generation in outer space. Recent developments in refractory metals manufacture and fabrication technologies are ripe for implementation in these orbiting power stations. Refractory metals offer strength to weight, heat transfer and containment advantages.

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