منابع مشابه
Comprehensive modelling of the planetary nebula LMC - SMP 61 and its [ WC ] - type central star
We present a comprehensive study of the Magellanic Cloud planetary nebula SMP 61 and of its nucleus, a Wolf-Rayet type star classified [WC 5-6]. The observational material consists of HST STIS spectroscopy and imaging, together with optical and UV spectroscopic data collected from the literature and infrared fluxes measured by IRAS. We have performed a detailed spectral analysis of the central ...
متن کاملThe Late Samuel Tuke, Esq., of York
worth, perhaps we may say, in all. It is one of the most interesting features of the social framework of Britain, that while it recognises the distinctions of feudal rank, and records the exit of each worthy head of a time-honoured house, as in some sort the property of the nation, not the less through the various gradations of the scale does it appreciate the successful citizen, the independen...
متن کاملFRACTURE AND FATIGUE BEHAVIOR OF WC-Co AND WC-CoNi CEMENTED CARBIDES
The fracture and fatigue characteristics of several cemented carbide grades are investigated as a function of their microstructure. In doing so, the influence of binder chemical nature and content (Co and 76wt%Co-24wt%Ni), as well as carbide grain size on hardness, flexural strength, fracture toughness and fatigue crack growth (FCG) behavior is evaluated. Mechanical testing is combined with a d...
متن کاملGeometric and Crystallographic Characterization of WC Surfaces and Grain Boundaries in WC-Co Composites
Electron backscattered diffraction has been used to determine the orientation of WC crystals in a WC-Co composite and atomic force microscopy has been used to measure the shapes of planar sections of the same crystals. A stereological analysis has been used to determine that { } 1010 prism facets and the {0001} basal planes are the WC surfaces that are most frequently in contact with Co. Furthe...
متن کاملEffect of WC Concentration on Abrasive Wear Properties of the Thermally Sprayed WC -Ni Coatings
In this work the effects of WC concentration on abrasive wear behavior by thermally sprayed WC coating was evaluated using three body abrasive wear tester. A different combination of WC and NI coatings were deposited on steel substrates by flame spraying using powder with different WC concentrations (0 %, 12.5 %, 25 %, and 50 %). Flame torch was used for heating and coating of process. Microstr...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 1880
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/40.7.381