We investigated the metal-diamond interface formation and the growth of chromium thin films as contact material on diamonds, which should help to improve single-crystal diamond (SCD) particle detectors. As shown previously [1], we are able to derive information about metal film conductivity by means of infrared spectroscopy (IRS) and analysing the data with a Drude type dielectric function. In ...

Abstract Metal-bonded grinding tools are commonly based on copper as bond material and possess low porosity. The powder metallurgic fabrication the applied process parameters have a high influence mechanical properties of these layers. In this study, Cu–diamond composites fabricated through Field Assisted Sintering Technology with variation holding time, temperature, pressure, chromium particle...

The purpose of this study is to develop a technical process for removing trivalent chromium from tannery wastewater via precipitation. This process can be considered an alternative that avoids a remediation procedure against the metal presence in industrial wastes. This process was verified in a treatment pilot plant located in León, México handling 10 m3/day of three types of effluents. The ef...

This research work presents the results of an experimental investigation of cryogenically treated, coated and uncoated tungsten carbide cutting tool inserts in turning of AISI 1040 steel. Three different tungsten carbide inserts coated with aluminum chromium nitride (AlCrN), titanium nitride (TiN) and uncoated WC were taken and treated cryogenically. Experiments were performed to evaluate the c...

Metal-doped diamond-like carbon films were produced for the purpose of an electrochemical nanoelectrode. In this study we use Z-contrast scanning transmission electron microscopy to directly observe metal cluster formation and distributions within the chromium-doped carbon films. At low doping ~;6 at. % Cr!, Cr is uniformly distributed within the C matrix; at high doping ~;12 at. % Cr!, Cr-rich...

It has been considered that the corrosion of passive metals and alloys is not caused by the active metal-dissolution but the dissolution of a nonporous passive oxide film in aqueous solution. The corrosion current density of iron(1)(2), chromium(3) and their alloys(4) is independent of the potential in all the range of passivity, although depending upon the pH of solution. Vetter(1) explained s...

Slight amounts of carbon (0:015{0:1mass%) were added into the Fe-30Mn-6Si-5Cr shape memory alloy. The microstructure, precipitation behaviour and shape memory performance of these Fe59Mn30Si6Cr5CX alloys with various thermo-mechanical treatments were investigated. Experimental results show that two particles, the -phase and M23C6 carbide, are observed within the grain-boundary phases. M23C6 car...

To achieve optimal mechanical properties in high manganese steels, the precipitation of nanoprecipitates of vanadium and niobium carbides is under investigation. It is shown that under controlled heat treatments between 850°C and 950°C following hot deformation, few-nanometre precipitates of either carbide can be produced in test steels with suitable contents of vanadium or niobium. The structu...

The primary carbide in high carbon chromium bearing steels, which arises from solute segregation during non-equilibrium solidification, is one of the key factors affecting mechanical properties and performance related components. In this work, effects forming element diffusion, austenite grain size, cooling rate on precipitation solidification an Fe–C binary alloy were studied by phase-field me...