Temat: neodymium magnets - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Structure and Properties of Nd-Fe-B Alloy Subjected to HDDR Process
Autorzy:: Szymański, M.
Michalski, B.
Leonowicz, M.
Miazga, Z.
Powiązania:: https://bibliotekanauki.pl/articles/352047.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: HDDR
magnets hydrogenation
Nd-Fe-B alloy
neodymium magnets
magnets recycling
Opis:: In this paper the Hydrogenation, Disproportionation, Desorption and Recombination (HDDR) route was tested, for the Nd-Fe-B master alloy, as a prospective procedure for recycling of sintered scrap neodymium magnets. The HDDR method is based on the hydrogen induced reversal phase transformation of Nd-Fe-B alloy: Nd₂Fe₁₄B + (2±x) H₂ = 2NdH_2±x + Fe₂B + 12Fe. Microstructural observations (SEM), phase constitution studies (XRD) and measurement of magnetic properties (VSM) were done to investigate the HDDR transformation progress. It was observed that disproportionation reaction starts at the grain boundaries, where the Nd-rich phase is located. Average grain size was reduced and coercive material was produced as a result of the HDDR process. Obtained results are similar to literature data.
Źródło:: Archives of Metallurgy and Materials; 2016, 61, 1; 217-220
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effective Laboratory Method of Chromite Content Estimation in Reclaimed Sands
Autorzy:: Ignaszak, Z.
Prunier, J. B.
Powiązania:: https://bibliotekanauki.pl/articles/380085.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: chromite sand
magnetic recuperation
neodymium magnets
furan sand dry
reclamation
ferrous alloys
heavy castings
Opis:: The paper presents an original method of measuring the actual chromite content in the circulating moulding sand of foundry. This type of material is applied for production of moulds. This is the case of foundry which most frequently perform heavy casting in which for the construction of chemical hardening mould is used, both the quartz sand and chromite sand. After the dry reclamation of used moulding sand, both types of sands are mixed in various ratios resulting that in reclaimed sand silos, the layers of varying content of chromite in mixture are observed. For chromite recuperation from the circulating moulding sand there are applied the appropriate installations equipped with separate elements generating locally strong magnetic field. The knowledge of the current ratio of chromite and quartz sand allows to optimize the settings of installation and control of the separation efficiency. The arduous and time-consuming method of determining the content of chromite using bromoform liquid requires operational powers and precautions during using this toxic liquid. It was developed and tested the new, uncomplicated gravimetric laboratory method using powerful permanent magnets (neodymium). The method is used in the production conditions of casting for current inspection of chromite quantity in used sand in reclamation plant.
Źródło:: Archives of Foundry Engineering; 2016, 16, 3; 162-166
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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