Metallography and magnetic properties of some samarium - transition metal 2: 17- type alloys.
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Metallography and magnetic properties of some samarium - transition metal 2: 17- type alloys.

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Published by University of Birmingham in Birmingham .
Written in English

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Thesis (Ph.D.) - University of Birmingham, Dept of Metallurgy and Materials, 1983.

ID Numbers
Open LibraryOL13796363M

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Of all the Sm-Co intermetallic compounds, SmCo 5 and Sm 2 Co 17 are the two important hard magnetic phases [1] and they crystallize in hexagonal CaCu 5 and Th 2 Ni 17 or rhombohedral-Th 2 Zn 17 Author: Oliver Gutfleisch. The temperature also influences the electronic and magnetic properties of SmCoO3. and a semiconductor-to-metal transition is reported at doped rare earth oxides with ABO 2-type structure.   This chapter discusses the magnetic properties of ternary rare-earth transition-metal compounds. The magnetism of pure elements concerns the properties of about 20 metals, mostly from the 3d or 4f series. Binary intermetallic compounds are much more numerous. Magnetic binaries may involve one or both elements with magnetic by: Amorphous alloys of the transition metal-metalloid type have been the subject of intense research in various laboratories [1] [2] [3]. In particular, Fe-based alloys produced by melt spinning.

  This effect is much more pronounced in a crystal structure where there is a combination of ferromagnetic transition metal and a rare-earth metal, for example, SmCo 5, Sm 2 (Co,Fe,Cu,Zr) 17 and Nd 2 Fe 14 B. This essential characteristic for permanent magnets based on these compounds will be discussed later in the chapter. Download Citation | Magnetism in disordered materials | Purpose: The paper is a review of some problems concerning micromagnetism and magnetism in .   Introduction. Spinel ferrites with formula MFe 2 O 4 where M is a divalent metal ion (e.g., Ni, Mn, Mg, Zn, Co, and Cu) are one of the most interesting magnetic oxides widely used due to their interesting magnetic, electrical, and optical properties,,,,,.These properties make it suitable for many technological applications such as high-density magnetic storage, microwave devices.   Mechanical properties of 3d transition metal CCAs are equivalent to commercial austenitic stainless steels and nickel alloys, while some refractory metal CCAs show potential to extend the service strength and/or temperature of nickel superalloys. Detailed analyses of microstructures and properties allow two major HEA hypotheses to be resolved.

Magnetic materials specifically permanent magnets are critical for the efficient performance of many renewable energy technologies. The increased reliance on renewable energy sources has accelerated research in energy-related technologies the world over. The use of rare-earth (RE) metals in permanent magnets continues to be a source of greater concern owing to the limited RE supply coupled.   Compositions and magnetic properties of some of these steel magnets are given in Table 1. Table 1 Nominal compositions and magnetic properties for some different types of steel [6]. Nominal Composition, weigh % Balance Fe materia l C Cr W M o Co Br(T) (BH)max(kJ/m 3) 1% C - - - - 6% Cr 5 6. Tantalum is a chemical element with the symbol Ta and atomic number Previously known as tantalium, it is named after Tantalus, a villain from Greek mythology. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. It is part of the refractory metals group, which are widely used as minor components in alloys. The chemical inertness of tantalum. SmCo5 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Sm is bonded in a 6-coordinate geometry to eighteen Co atoms. There are six shorter ( Å) and twelve longer ( Å) Sm–Co bond lengths. There are two inequivalent Co sites. In the first Co site, Co is bonded in a coordinate geometry to three equivalent Sm and six equivalent Co atoms.