The use of a scanning electron microscope to examine whisker growth on an iron-aluminium alloy

1966 ◽  
Vol 1 (2) ◽  
pp. 211-212 ◽  
Author(s):  
G. A. Gardner ◽  
R. W. Cahn
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Aluminium Alloy ◽  
Whisker Growth ◽  
Scanning Electron

The Effect of Surface Finish on Zinc Whisker Growth

2012 ◽  
Vol 472-475 ◽  
pp. 2756-2759
Author(s):  
Wen Cui ◽  
Shao Jun Qi
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Surface Finish ◽  
Whisker Growth ◽  
Experimental Conditions ◽  
Steel Substrates ◽  
The Relationship ◽  
Rough Surface Finish ◽  
Scanning Electron ◽  
Effect Of Surface

To understand the relationship between surface finish and zinc whisker growth, this study investigated the growth of whiskers on two mild steel substrates of different surface finish by Field Emission Gun Scanning Electron Microscope (FEG SEM). Results show that, under the same experimental conditions, deposits on substrates with a mirror finish grew less whiskers and nodules than substrates with a rough surface finish.

An experimental study on the deformation behaviour and fracture mode of recycled aluminium alloy AA6061-reinforced alumina oxide undergoing high-velocity impact

2020 ◽  
Vol 234 (23) ◽  
pp. 4659-4670
Author(s):  
MK Mohd Nor ◽  
CS Ho ◽  
FNA Janudin
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Aluminium Alloy ◽  
Impact Velocity ◽  
Damage Evolution ◽  
Deformation Behaviour ◽  
Alumina Oxide ◽  
Impact Area ◽  
The Impact ◽  
Scanning Electron

The anisotropic behaviour and the damage evolution of recycled aluminium alloy-reinforced alumina oxide are investigated in this paper using Taylor impact test. The test is performed at various impact velocity ranging from 190 to 360 m/s by firing a cylindrical projectile towards anvil target. The deformation behaviour and the fracture modes are analysed using the digitized footprint of the deformed specimens. The damage initiation and the progression are observed around the impact surface and the surface 0.5 cm from the impact area using the scanning electron microscope. The deformed specimens showed several ductile fracture modes of mushrooming, tensile splitting and petalling. The critical impact velocity is defined below 280 m/s. The specimens showed a strong strain-rate dependency due to the damage evolution that is driven by severe localized plastic-strain deformation. The scanning electron microscope analysis showed the damage mechanism progress via voids initiation, growth and coalescence in the material. The micrograph within the footprint surface shows the presence of alumina oxide particles within the specimen. The microstructure analysis shows a significant refinement of the specimen particle at the surface located 0.5 cm above the impact area. ImageJ software is adopted in this work to measure the average size of voids within this surface. Non-symmetrical (ellipse-shaped) footprint around the footprints showed plastic anisotropic behaviour. The results in this paper provide a better understanding of the deformation behaviour of recycled materials subjected to dynamic loading. This information on mechanical response is crucial before any potential application can be established to substitute the primary sources.

scholarly journals Effect of Quartz-Silicon Dioxide Particulate on Tensile Properties of Aluminium Alloy Cast Composites

2011 ◽  
Vol 471-472 ◽  
pp. 727-732 ◽  
Author(s):  
Mohd Sayuti ◽  
Shamsuddin Sulaiman ◽  
B.T. Hang Tuah Baharudin ◽  
Mohd Khairol A. Arifin ◽  
T.R. Vijayaram ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Silicon Dioxide ◽  
Aluminium Alloy ◽  
Tensile Properties ◽  
Tensile Tests ◽  
Moulding Process ◽  
Particulate Reinforced ◽  
Scanning Electron

This paper describes an experimental investigation of the tensile properties of quartz-silicon dioxide particulate reinforced LM6 aluminium alloy composite. In this experimental, quartz-silicon dioxide particulate reinforced LM6 composite were fabricated by carbon dioxide sand moulding process with variation of the particulate content on percentage of weight. Tensile tests were conducted to determine tensile strength and modulus of elasticity followed by fracture surface analysis using scanning electron microscope to characterize the morphological aspects of the test samples after tensile testing. The results show that the tensile strength of the composites decreased with increasing of quartz particulate content. In addition, this research article is well featured by the particulate-matrix bonding and interface studies which have been conducted to understand the processed composite materials mechanical behaviour. It was well supported by the fractographs taken using the scanning electron microscope (SEM). The composition of SiO2 particulate in composite was increased as shown in EDX Spectrum and Fractograph.

scholarly journals Tribological, Thermal and Corrosive behaviour of aluminium alloy 2219 reinforced by Si3N4 nanosized powder

2021 ◽  
Author(s):  
Manjunatha C J ◽  
B. Venkata Narayana ◽  
D Bino Prince Raja ◽  
Rimal Isaac R S
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Aluminium Alloy ◽  
Corrosion Behaviour ◽  
Thermo Gravimetric Analysis ◽  
Stir Casting ◽  
High Energy ◽  
Gravimetric Analysis ◽  
Test Pieces ◽  
Scanning Electron

Abstract The MMC technique is the most effective contrast method when compared with other techniques. By using the method of high energy stir casting, Aluminium alloy Al2219 is reinforced with various percentages of Si3N4 (0, 3, 6, and 9%) particles. X-ray diffraction along with Scanning electron microscope was performed to characterize the composite. The mechanical and thermal behaviours such as differential thermal analysis thermo gravimetric analysis/, tensile , wear and hardness behaviours were investigated. By using electro chemical potentiodynamic polarization test, the consequence of heat treatment on the corrosion behaviour of the composites when compared to its matrix in 3.5 % NaCl when at 600 rpm was also investigated. In this experimental study, the wear of the aluminium composites was significantly decreased on addition of Si3N4 particles. The study also revealed that, since the inclusion of Si3N4 in the samples and compared to the base aluminium alloy, the mechanical properties of the composites, such as wear resistance , hardness and tensile strength increased by percentage. The surface morphology and Scanning electron microscope analysis of worn surfaces in the test pieces unfold that with the increase in reinforcement content, wear rate decreases.

Vapor-Liquid-Solid Whisker Growth on Lunar Breccia 15015

1973 ◽  
Vol 31 ◽  
pp. 192-193
Author(s):  
James L. Carter ◽  
D. L. Crosthwait
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Electron Microprobe ◽  
Whisker Growth ◽  
Energy Dispersive ◽  
Vapor Liquid Solid ◽  
First Time ◽  
Scanning Electron ◽  
Vapor Liquid

Possible VLS (Vapor-Liquid-Solid) whisker growth has been discovered for the first time in nature on the surface of lunar breccia 15015. Rock 15015 was collected on the Apollo 15 flight and is blocky, angular, largely glass-covered, almost 30 cm long and weighs 4.5 kg. A 62 mm2 glass-covered surface of a fragment of 15015 (15015,36) was coated with 150 Å of Au and selected areas studied in detail with a JEOLCO JSM-1 scanning electron microscope (SEM), an ARL scanning electron microprobe (EMX SM) with a QANTA/METRIX energy dispersive spectrophotometer and a Cambridge MK IIA SEM at Texas Instruments, Inc. of Dallas.

scholarly journals Characteristics of Porous Aluminium Materials Produced by Pressing Sodium Chloride into Their Melts

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4809
Author(s):  
Iva Nová ◽  
Karel Fraňa ◽  
Pavel Solfronk ◽  
Jiří Sobotka ◽  
David Koreček ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Sodium Chloride ◽  
Scanning Electron Microscope ◽  
Relative Density ◽  
Aluminium Alloy ◽  
Particle Sizes ◽  
Computed Tomograph ◽  
Air Cells ◽  
Scanning Electron ◽  
Unconventional Method

The paper deals with research related to the production of metal cellular aluminium systems, in which production is based on the application of sodium chloride particles. In this paper, the properties of porous aluminium materials that were produced by an unconventional method—by pressing salt particles into the melt of aluminium alloy—are described. The new methodology was developed and verified for the production of these materials. The main feature of this methodology is a hydraulic forming press and a simple-shaped foundry mould. For these purposes, four different groups of sodium chloride particle sizes (1 to 3, 3 to 5, 5 to 7 and 8 to 10 mm) were applied. The preferred aluminium foundry alloy (AlSi12) was used to produce the porous aluminium samples. Based upon this developed methodology, samples of porous aluminium materials were produced and analysed. Their weight and volume were monitored, their density and relative density were calculated, and their porosity was determined. In addition, the porosity of samples and continuity of their air cells were monitored as well. An industrial computed tomograph and a scanning electron microscope were applied for these purposes.

In-Situ Measurement of Bending Strength of TiC Whiskers in the Scanning Electron Microscope

1994 ◽  
Vol 365 ◽  
Author(s):  
Yutaka Seino ◽  
Shoichiro Shin ◽  
Satoshi Nagai
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Bending Strength ◽  
Whisker Growth ◽  
Growth Direction ◽  
Three Point Bending ◽  
Cleavage Strength ◽  
The Difference ◽  
Scanning Electron

ABSTRACTThe three–point bending strength of TiC whiskers was measured in a scanning electron microscope. The whisker samples have ∼ 50µm length and 2∼4µm diameter and are commercially available as reinforcements for composite materials. The distribution of the bending strengths of the whiskers showed a double peak around 5.2GPa and 30.4GPa, respectively. The difference in these values is attributed to differences in the cleavage strength of two crystal planes depending on whisker growth direction.

The Alteration of the Pore Spaces in Sandstones

1973 ◽  
Vol 31 ◽  
pp. 210-211
Author(s):  
R. E. Ferrell ◽  
G. G. Paulson
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
The Other ◽  
Coarse Grained ◽  
Depositional Fabric ◽  
Soluble Components ◽  
Scanning Electron ◽  
Shape And Size

The pore spaces in sandstones are the result of the original depositional fabric and the degree of post-depositional alteration that the rock has experienced. The largest pore volumes are present in coarse-grained, well-sorted materials with high sphericity. The chief mechanisms which alter the shape and size of the pores are precipitation of cementing agents and the dissolution of soluble components. Each process may operate alone or in combination with the other, or there may be several generations of cementation and solution.The scanning electron microscope has ‘been used in this study to reveal the morphology of the pore spaces in a variety of moderate porosity, orthoquartzites.

The Broad Applications of the Scanning Electron Microscope

1969 ◽  
Vol 27 ◽  
pp. 20-21
Author(s):  
C. T. Nightingale ◽  
S. E. Summers ◽  
T. P. Turnbull
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Light Microscopy ◽  
Surface Topography ◽  
Great Depth ◽  
Resolving Power ◽  
Depth Of Field ◽  
Pictorial Representations ◽  
Scanning Electron

The ease of operation of the scanning electron microscope has insured its wide application in medicine and industry. The micrographs are pictorial representations of surface topography obtained directly from the specimen. The need to replicate is eliminated. The great depth of field and the high resolving power provide far more information than light microscopy.

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