A comparison was made between two approaches to predict acoustic emission waveforms in thin plates. A normal mode solution method for Mindlin plate theory was used to predict the response of the flexural plate mode to a point source, step-function load, applied on the plate surface. The second approach used a dynamic finite element method to model the problem using equations of motion based on ...

Abrasive machining is one of the most non-conventional processes for finishing. It is widely used in industry to machine the materials like mild steel, aluminum, copper, titanium, glass, hard rock material, graphite, composite material, ceramics etc.Like in abrasive jet machining. This technique uses jet which contains abrasive material. Now a day water-magnetic abrasive machining is one of the...

Metal-matrix composites (MMCs) are used in a large number of high-performance applications. In 2004, more than 3.5 million kg of MMCs were used and the number is increasing rapidly, with an annual growth rate exceeding 6%. Most of the current MMC applications are in ground transportation, aviation, electronics, and sports industries. The initial discovery of the synthesis of cast aluminum-matri...

The coupling of model batteries and surface-sensitive techniques provides an indispensable platform for interrogating the vital surface/interface processes in battery systems. Here, we report a sandwich-format nanopore-array using ultrathin graphite electrode anodized aluminum oxide (AAO) film. porous framework AAO regulates contact pattern electrolyte with from inner side, while minimizing con...

A tandem ionization chamber, developed at the Instituto de Pesquisas Energéticas e Nucleares (IPEN), for X radiation beams, radiotherapy level, was applied into a quality control program of the Calibration Laboratory of IPEN. This ionization chamber is composed by two ionization chambers, with a volume of 0.6 cm each one. Its inner plane-parallel electrodes and guard rings are made of different...

The corrosion behavior of three sorts of refractories based on alumina-graphite were studied by immersion tests. The melts included smelting reduction molten slag and corresponding carbon saturated molten iron. The influence of test temperature, FeO content in slag and specimen rotative velocity on the corrosion rate of refractories was examined. By means of SEM and EDS, the microstructure chan...

Several different beam dumps using parallel groove structures were made for use in absorbing electron cyclotron radiation emitted from fusion plasmas. The materials used were Pyrex. Macor, alumina, and graphite. Broadband absorption measurements indicate more than 99 % power absorption for dumps made of Pyrex and Macor, while absorption by alumina and graphite dumps are noticeably less. Waves p...

In this work, a novel technique is presented for the graphene fabrication based on the pulsed laser ablation of graphite target inside the cryogenic liquid using the pulsed nanosecond Q-switched Nd:Y3Al5O12 (Nd:YAG) laser at 1064 nm. Single-stage fabrication process is taken into account as a remarkable advantage without need to high vacuum devices and additional chemical components. The synthe...

Previously, we reported 3D hydrodynamic simulations of interaction of a wheel shaped solid graphite Super–FRS production target with the SIS100, 1.5 GeV/u uranium beam [1]. These simulations have shown that the target will survive (retain its elastic properties) for a beam intensity of up to 3x10 ions per 50 ns long bunch if one uses a focal spot size that is characterized with σ = 4 mm. Howeve...