Preparation of metastable alloy bulk material in Fe-Cu system by mechanical alloying and shock compression

1998 ◽  
Author(s):  
X. S. Huang ◽  
M. Ono ◽  
T. Mashimo
Keyword(s):  
Mechanical Alloying ◽  
Shock Compression ◽  
Bulk Material ◽  
Metastable Alloy

scholarly journals A Novel Process to Form Al-12 mass%Si Bulk Material from Machined Chips using Bulk Mechanical Alloying

2002 ◽  
Vol 43 (5) ◽  
pp. 1178-1182 ◽  
Author(s):  
Tachai Luangvaranunt ◽  
Katsuyoshi Kondoh ◽  
Tatsuhiko Aizawa
Keyword(s):  
Mechanical Alloying ◽  
Bulk Material

A Study on the Cylindrical Shock Compression Device Using Shock Wave Generated by Explosion of Explosive

2007 ◽  
Author(s):  
Megumi Nakamyosu ◽  
Young Kook Kim ◽  
Shigeru Tanaka ◽  
Shigeru Itoh
Keyword(s):  
Shock Wave ◽  
Shock Compression ◽  
Bulk Material ◽  
Synthesis Method ◽  
Graphite Powder ◽  
X Ray Diffraction ◽  
Explosive Compaction ◽  
Compression Device ◽  
Shock Compaction ◽  
Explosive Forming

There are a lot of studies related to the shock wave generated by explosive; explosive compaction [1], explosive welding [2], shock synthesis [3], and explosive forming [4]. Especially, shock synthesis is interested. Recently, the artificially diamond with high-function material using shock synthesis method is being studied. In this paper, to obtain an Al/Graphite and Cu/Graphite consolidated bulk material, shock compaction method is employed. Experiments are carried out using a cylindrical shock compression device. The samples are Al/Graphite and Cu/Graphite powder. In these experiments, the pressure which acts on powder container was not high because as a X-ray diffraction result, a peak of diamond was not appeared in any cases. However, the consolidated material of Al/Graphite and Cu/Graphite are obtained.

Lattice imaging and pore structure of β ferric oxyhydroxide

1978 ◽  
Vol 36 (1) ◽  
pp. 264-265
Author(s):  
T. Baird ◽  
J.R. Fryer ◽  
S.T. Galbraith
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
Bulk Material ◽  
Model Structure ◽  
Bulk Crystals ◽  
Lattice Imaging ◽  
Thin Sections ◽  
Ferric Oxyhydroxide ◽  
Resolution Electron ◽  
Hydrolysis Of

Introduction Previously we had suggested (l) that the striations observed in the pod shaped crystals of β FeOOH were an artefact of imaging in the electron microscope. Contrary to this adsorption measurements on bulk material had indicated the presence of some porosity and Gallagher (2) had proposed a model structure - based on the hollandite structure - showing the hollandite rods forming the sides of 30Å pores running the length of the crystal. Low resolution electron microscopy by Watson (3) on sectioned crystals embedded in methylmethacrylate had tended to support the existence of such pores.We have applied modern high resolution techniques to the bulk crystals and thin sections of them without confirming these earlier postulatesExperimental β FeOOH was prepared by room temperature hydrolysis of 0.01M solutions of FeCl3.6H2O, The precipitate was washed, dried in air, and embedded in Scandiplast resin. The sections were out on an LKB III Ultramicrotome to a thickness of about 500Å.

Precipitation in Al + 4% Cu Epitaxial Films

1968 ◽  
Vol 26 ◽  
pp. 384-385
Author(s):  
S. Herd ◽  
S. M. Mader
Keyword(s):  
Solid Solution ◽  
Bulk Material ◽  
Epitaxial Films ◽  
Detectable Change ◽  
Cu Films ◽  
Solution Treated ◽  
Single Crystal Films ◽  
Crystal Films ◽  
Diffraction Patterns ◽  
Deposited Films

Single crystal films in (001) orientation, about 1500 Å thick, were produced by R-F sputtering of Al + 4 wt % Cu onto cleaved KCl at 150°C substrate temperature. The as-deposited films contained numerous θ-CuAl2 particles (C16 structure) about 0.1μ in size. They were transferred onto Mo screens, solution treated and rapidly cooled (within about ½ min) so as to retain a homogeneous solid solution. Subsequently, the films were aged in vacuum at various temperatures in order to induce precipitation and to compare structures and morphologies of precipitate particles in Al-Cu films with those found in age hardened bulk material.Aging for 3 weeks at 60°C or 48 hrs at 100°C did not produce any detectable change in high resolution micrographs or diffraction patterns. In this range Guinier-Preston zones (GP) form in quenched bulk material. The absence of GP in the present experiments in this aging range is perhaps due to the cooling rate employed, which might be more equivalent to an aged and reverted bulk material than to a quenched one.

Investigation of cluster layers of small netal particles by TEM, SEM, EELS and by photoacoustic spectroscopy

1990 ◽  
Vol 48 (4) ◽  
pp. 250-251
Author(s):  
H. Seiler ◽  
U. Haas ◽  
K.H. Körtje
Keyword(s):  
Bulk Material ◽  
High Vacuum ◽  
Optical Methods ◽  
Metal Particles ◽  
Silver Particles ◽  
Low Loss ◽  
Plasmon Excitation ◽  
First Results ◽  
Diffraction Patterns ◽  
Small Metal Particles

The physical properties of small metal particles reveal an intermediate position between atomic and bulk material. Especially Ag has shown pronounced size effects. We compared silver layers evaporated in high vacuum with cluster layers of small silver particles, evaporated in N2 at a pressure of about 102 Pa. The investigations were performed by electron optical methods (TEM, SEM, EELS) and by Photoacoustic (PA) Spectroscopy (gas-microphone detection).The observation of cluster layers with TEM and high resolution SEM show small silver particles with diameters of about 50 nm (Fig. 1 and Figure 2, respectively). The electron diffraction patterns of homogeneous Ag layers and of cluster layers are similar, whereas the low loss EELS spectra due to plasmon excitation are quite different. Fig. 3 and Figure 4 show first results of EELS spectra of a cluster layer of small silver particles on carbon foil and of a homogeneous Ag layer, respectively.

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