Focused ion beam milling: A practical method for preparing cast Al-Si alloy samples for transmission electron microscopy

From: Metallurgical and Materials Transactions | Date: March 1, 2003| Author: | Copyright information

The aluminum-silicon eutectic reaction has been of great interest ever since Pacz patented aluminum-silicon alloys in 1921.[1] However, despite the many hypotheses proposed over the past 80 years,[2] the genesis of this technologically important transformation and the crystallographic relations between its constituents remain uncertain. This is mainly due to the lack of conclusive evidence provided by experimentation in support of the proposed hypotheses. Particularly, conventional sample preparation techniques such as ion milling and electropolishing are not capable of allowing the user to ...

Read all of this article with a FREE trial to HighBeam Research

Related newspaper, magazine, and trade journal articles from HighBeam Research

(Including press releases, facts, information, and biographies)

A fine gamma' + alpha cellular structure in Fe-37.3 Wt Pct Ni-3.6 Wt Pct Al-3.3 Wt Pct Ti-0.2 Wt Pct C and its influence on high-temperature tensile properties
; Fe-37.3 wt pct Ni-3.6 wt pct Al-3.3 wt pct Ti-0.2 wt pct C alloy, which reveals an excellent combination of high strength and good elongation endowed by formation of homogeneously dispersed fine gamma' precipitates in the matrix during aging at 823...
Thermal transformations in mechanically alloyed Fe-Zn-Si materials
; The ball milling of elemental powders corresponding to F (Fe3Zn10) + 0.12 wt pct Si; F, (Fe5Zn21) + 0.12 wt pct Si; 5 (FeZn7) + 0.12 wt pct Si; and ' (FeZn13) + 0.12 wt pct Si composition ratios yields crystalline, mechanically alloyed...
Ductility and Impact Resistance of Powder-Metallurgical Molybdenum-Rhenium Alloys
; Mo-Re alloys containing between 5 and 47.5 wt pct Re were fabricated from Mo and Mo-Re powders...were examined. Up to a concentration of 41 wt pct Re. the Charpy ductileto-brittle transition...rhenium concentration. Between 10 and 41 wt pct rhenium, the room-temperature tensile ...
On the influence of Si-Ge additions on the aging response of Al-Cu
; ...to the ternary Al-Si-Ge, a dramatic hardening result could be achieved.[1] Alloys of the composition Al5.7 wt pct Cu-0.5 wt pct Si-1.3 wt pct Ge (which is Al-2.5 at. pct Cu-0.5 at. pct Si-0.5 at. pct Ge) and Al-5.4 wt pct Cu-1 wt pct Si-2.63 wt ...
Relationship between tensile and shear strengths of the mushy zone in solidifying aluminum alloys
; Strength development in the mushy zone during solidification of three aluminum alloys (Al-4 wt pct Cu, Al-7 wt pct Si-I wt pct Cu, and Al-7 wt pct Si-4 wt pct Cu) has been measured with two different techniques-horizontal tensile testing...
Studies of the morphology of the Al-Rich interfacial layer formed during the hot dip galvanizing of steel sheet
; ...containing 0.10, 0.12, 0.13, 0.16, and 0.18 wt pct Al were used to produce galvanized coatings...achieved in baths with Al content above 0.15 wt pct. The Al-rich layer is isomorphous to Fe...with large amounts of Zn present (22 to 28 wt pct). The morphology of the Al-rich layer is...
A Novel Experiment for the Study of Substrate-Induced Nucleation in Metallic Alloys: Application to Zn-Al
; ...nucleation and growth mechanisms of Zn-0.2 wt pct Al grains in thin coatings deposited on...observed in longitudinal sections of Zn-0.2 wt pct Al (-Sb) alloys. Without Sb, the CTG began...undercooling for the formation of Zn-0.2 wt pct Al grains on the steel sheet is about 0...
The rate of reaction of solid iron with oxidized "FeO"-CaO-SiO2-Al2O3 slags at 1360 (degrees)C--the chemical diffusivity of iron oxide
; ...41CaO 38SiO^sub 2^-21Al^sub 2^O^sub 3^ (wt pct) slags at 1360 deg.C by a rotating disc...concentrations of between 1.8 and 13.4 wt pct and rotation speeds up to 1000 rpm, the...empirical expression log D = -6.11 + 0.08 (wt pct Fe). It is concluded that the values of...
Stress-Induced products in a Ti-14.8 V alloy deformed in tension
; ...stress-induced transformation products in a Ti 14.8 wt pct vanadium alloy. Stress-induced transformation...vanadium contents ranging from 20 to 40 wt pct. Similar results were reported by Ling...chromium contents ranging from 8 to 20 wt pct. Two variants of the omega phase were ...
Reactive phosphide inclusions in commerical ferrosilicon
; ...commercial ferrosilicon alloys containing ~75 wt pct Si. Based on previous work, it is suspected...ferrosilicon alloys containing greater than 0.1 wt pct (0.1 at. pct) phosphorus. Researchers in...aluminum in synthetically produced Fe-45 wt pct Si and Fe-65 wt pct Si ...