Reproducible Metal-Carbon Eutectic Fixed-Points
نویسندگان
چکیده
The potential reproducibility of hightemperature metal-carbon fixed-points has been investigated. Crucibles and metals from NPL were used to construct fixed-points using NMIJ facilities. Agreement at 2700 K was better than the 80 mK uncertainty. Appropriate construction should permit this level of reproducibility between cells made at different National Measurement Institutes.
منابع مشابه
Electrofinishing of metals using eutectic based ionic liquids
Ionic liquids are molten salts that have low melting points. This review concentrates upon eutectic mixtures of quaternary ammonium salts and metal salts (usually halides). These so-called eutectic based ionic liquids can be used for the electrodeposition and dissolution of a wide range of metals and alloys. The review highlights the technological challenges involved in the application of ionic...
متن کاملReference Spectrometry for Calibration of Optical Earth Observation Systems
A small palm-sized, reference spectrometer, mounted on a remote controlled model helicopter is being developed and tested to provide calibrated reference data for optical Earth Observation systems by the National Physical Laboratory (NPL) in conjunction with City University in London. The spectrometer is traceable to NPL’s primary standard cryogenic radiometer. The traceability chain includes t...
متن کاملInstability and transport of metal catalyst in the growth of tapered silicon nanowires.
During metal-catalyzed growth of tapered silicon nanowires, or silicon nanocones (SiNCs), Au-Si eutectic particles are seen to undergo significant and reproducible reductions in their diameters. The reductions are accompanied by the transfer of eutectic droplet mass to adjacent, initially metal catalyst-free substrates, producing secondary nucleation and growth of SiNCs. Remarkably, the catalys...
متن کاملIn-situ laser synthesis of Nd-Al-O coatings: the role of sublattice cations in eutectic formation.
Neodymium aluminate coatings have been prepared in-situ by the laser zone melting (LZM) method, using a CO2 SLAB-type laser emitting at 10.6 µm. Polycrystalline Al2O3 commercial plates have been used as substrates, and coatings were prepared from the corresponding mixtures of powdered neodymium and aluminium oxides as starting materials. Microstructure, studied by SEM and phase composition, stu...
متن کاملDirectional solidification of metal-gas eutectic and fabrication of regular porous metals
Directional solidification of metal-gas eutectic (Gasar) is a novel process for making regular porous metals. This process is based on a solid-gas eutectic reaction involving a gaseous medium and a metal or a ceramic phase, and allows an easy control of the porosity, such as its pore size, pore orientation and morphology in a wide range by properly adjusting its melting and solidification condi...
متن کامل