4 research outputs found

    Cold spray deposition of mechanically alloyed Cu\u2013Ni\u2013Fe material for application as inert anodes for aluminum production

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    Cold spray deposition was evaluated for the production of inert anodes for Al electrolysis from mechanically alloyed Cu 12Ni 12Fe powders. Cu<SUB>65</SUB>Ni<SUB>20</SUB>Fe<SUB>15</SUB> (in wt. %) alloy was first prepared from elemental Cu, Ni, Fe powders using an attritor. After 40 h of milling, a nanocrystalline and monophasic Cu(Ni,Fe) solid solution was formed. It was shown that the particle size of the milled powder can be controlled with the addition of stearic acid to the initial powder mixture. In a second step, the cold spray parameters (pressure and temperature of the carrier N<SUB>2</SUB> gas) were optimized in order to maximize the impact velocity of the Cu<SUB>65</SUB>Ni<SUB>20</SUB>Fe<SUB>15</SUB> particles on the substrate. Then, thick (1100 \u3bcm), dense (porosity of 1 12 2 %) and adherent (adhesion strength of 15 MPa) coatings of Cu<SUB>65</SUB>Ni<SUB>20</SUB>Fe<SUB>15</SUB> on C63000 substrate (copper aluminium bronze alloy) were produced. No structural change of the Cu<SUB>65</SUB>Ni<SUB>20</SUB>Fe<SUB>15</SUB> alloy was observed during cold spray processing.Peer reviewed: YesNRC publication: Ye

    Cold sprayed Cu-Ni-Fe anode for Al production

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    Inert anodes for Al electrolysis were produced by cold spray deposition of mechanical alloyed 65Cu20Ni15Fe powder. No structural change of the 65Cu20Ni15Fe alloy was observed during the cold spray processing apart from a small crystallite size increase. The electrochemical characterization was performed at 700\ub0C in a potassium cryolite-based electrolyte. A progressive increase of the cell voltage was observed during the 50h of electrolysis. This is thought to reflect a decrease of the electrical conductivity of the anode attributed to the accumulation of electrolyte at the oxide/alloy interface and to the formation of insulating FeF2 precipitates in the bulk alloy.Peer reviewed: YesNRC publication: Ye

    Phylogeography and postglacial recolonization of Europe byRhinolophus hipposideros: evidence from multiple genetic markers

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    Nuclear (18S and ITS) and mitochondrial (16S) ribosomal RNA gene sequences were determined from genetically distinct wild-type strains of Antarctic (nine strains), Fuegian (four strains), Greenland (nine strains) and Svalbard (three strains) populations of the marine ciliate, Euplotes nobilii, and analysed for their nucleotide polymorphisms. A close genetic homogeneity was found within and between the Antarctic and Fuegian populations, while more significant levels of genetic differentiation were detected within and between the two Arctic populations, as well as between these populations and the Antarctic/Fuegian ones. The phylogeographical pattern that was derived from these data indicates that gene flow is not limited among Arctic populations; it equally connects the Arctic and Antarctic populations either directly, or through the Fuegian population. This indication reinforces previous evidence from laboratory assays of mating interactions between some of the strains analysed in this work that Southern and Northern polar populations of E. nobilii belong to a unique, panmictic population that substantially share the same gene pool

    Erratum to: Guidelines for the use and interpretation of assays for monitoring autophagy (3rd edition) (Autophagy, 12, 1, 1-222, 10.1080/15548627.2015.1100356

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