Borocarbides
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Effect of Quenching Process on Microstructure and performance of High-Boron High-Speed Steel
ABSTRACT The effects of quenching process on microstructure and hardness of High-Boron High-Speed Steel (HB-HSS) containing 0.4%C-6.0%Cr-4.0%Mo-1.0%V-1.0%Si-0.5Mn-x%B-y%Al (x=1.0, 1.5, 2.0, y=1.0, 2.0, 3.0) were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and Rockwell hardness tester. The exp
Matéria (Rio J.). Publicado em: 16/09/2019
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2. Characterization of Impact Toughness Properties of DIN39MnCrB6-2 Steel Grade
Boron added steels in quenched and tempered condition have been widely used in applications where good mechanical properties and low cost are required. In this study, impact resistance of DIN 39MnCrB6-2 steel grade was investigated due to its criticality in automotive components. Metastable phase diagrams were built to guide heat treatments. The influence he
Mat. Res.. Publicado em: 04/12/2017
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3. Effects of austenitization temperature on the microstructure of 15BCr30 and PL22 boron steels
This paper studies boron precipitation and segregation at austenitic grain boundaries for low carbon boron steels types: PL22 and 15BCr30. The following parameters were evaluated: percentage of martensite/bainite, size and nucleation sites of austenitic grains and precipitates sizes. Three austenitization temperatures were studied (870, 1050 and 1200 °C). T
Mat. Res.. Publicado em: 16/04/2013
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4. An investigation of structural and magnetic properties of the Nd16Co72-xRu xC11B coro-carbides
Nd16Co72-xRu xC11B boro-carbides have been prepared by arc melting and studied by X-ray diffraction and magnetization measurements. X-ray diffraction results confirm that all the prepared alloys possess the tetragonal 2:14:1 (P4(2)/mmm) hard magnetic phase. The observed decrease of the magnetization and Curie temperature indicate the development of antiferro
Brazilian Journal of Physics. Publicado em: 2008-06
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5. ESTUDO DO PARÂMETRO DE ORDEM E DO MOMENTO MAGNÉTICO EM BOROCARBETOS PSEUDOQUATERNÁRIOS / STUDY OF ORDER PARAMETER AND MAGNETIC MOMENT IN PSEUDOQUATERNARY BOROCARBIDES
Experimental data show that the dissolved impurities of the Mn presents a magnetic moment when substitute the Ni atom in pseudoquaternary borocarbide Y (Ni(1−x)Mx)2B2C, this is not observed if the impurities are Fe and Co. In this work we do a theoretical study of the superconducting order parameter variation and a possible formation of impurities magn
Publicado em: 2007
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6. PROPRIEDADES TÉRMICAS E MAGNÉTICAS DOS BOROCARBETOS / THERMAL AND MAGNETIC PROPERTIES OF A SERIES OF BOROCARBIDES
We propose a spin hamiltonian to describe the magnetic and thermal properties of a series of borocarbides. The effect of the crystal electric field is simulated by an effective magnetic field. By applying spin wave theory we have found the dispersion relation and the density of state for the magnos as well. In presence of an external magnetic field this dens
Publicado em: 2002