Size Evolution of Alkanethiol-Protected Gold Nanoparticles by Heat Treatment in the Solid State

2003 ◽  
Vol 107 (12) ◽  
pp. 2719-2724 ◽  
Author(s):  
Takami Shimizu ◽  
Toshiharu Teranishi ◽  
Satoshi Hasegawa ◽  
Mikio Miyake
Keyword(s):  
Heat Treatment ◽  
Gold Nanoparticles ◽  
Solid State ◽  
Size Evolution

Heat-Induced Size Evolution of Gold Nanoparticles in the Solid State

2001 ◽  
Vol 13 (22) ◽  
pp. 1699-1701 ◽  
Author(s):  
T. Teranishi ◽  
S. Hasegawa ◽  
T. Shimizu ◽  
M. Miyake
Keyword(s):  
Gold Nanoparticles ◽  
Solid State ◽  
Size Evolution

scholarly journals Grain Size Evolution and Mechanical Properties of Nb, V–Nb, and Ti–Nb Boron Type S1100QL Steels

Metals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 492
Author(s):  
Jan Foder ◽  
Jaka Burja ◽  
Grega Klančnik
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Grain Size ◽  
Hot Forging ◽  
Size Control ◽  
High Strength ◽  
Fatigue Properties ◽  
Titanium Addition ◽  
Austenite Grain Size ◽  
Size Evolution

Titanium additions are often used for boron factor and primary austenite grain size control in boron high- and ultra-high-strength alloys. Due to the risk of formation of coarse TiN during solidification the addition of titanium is limited in respect to nitrogen. The risk of coarse nitrides working as non-metallic inclusions formed in the last solidification front can degrade fatigue properties and weldability of the final product. In the presented study three microalloying systems with minor additions were tested, two without any titanium addition, to evaluate grain size evolution and mechanical properties with pre-defined as-cast, hot forging, hot rolling, and off-line heat-treatment strategy to meet demands for S1100QL steel. Microstructure evolution from hot-forged to final martensitic microstructure was observed, continuous cooling transformation diagrams of non-deformed austenite were constructed for off-line heat treatment, and the mechanical properties of Nb and V–Nb were compared to Ti–Nb microalloying system with a limited titanium addition. Using the parameters in the laboratory environment all three micro-alloying systems can provide needed mechanical properties, especially the Ti–Nb system can be successfully replaced with V–Nb having the highest response in tensile properties and still obtaining satisfying toughness of 27 J at –40 °C using Charpy V-notch samples.

Effect of Heat Treatment Conditions on the Properties of Nanoporous Glasses Activated by Gold Nanoparticles

2021 ◽  
Author(s):  
G. Yu. Shakhgil’dyan ◽  
A. A. Mikhailov ◽  
T. O. Lipat’eva ◽  
K. I. Piyanzina ◽  
E. A. Kolesnikov ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Gold Nanoparticles ◽  
Treatment Conditions

Influence of Heat Treatment on Microstrudture and Mechanical Properties of AZ31B Magnesium Alloy Prepared by Solid-State Recycling

2012 ◽  
Vol 271-272 ◽  
pp. 17-20
Author(s):  
Shu Yan Wu ◽  
Ze Sheng Ji ◽  
Chun Ying Tian ◽  
Ming Zhong Wu
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid State ◽  
Magnesium Alloy ◽  
Static Recrystallization ◽  
Annealing Treatment ◽  
Az31b Magnesium Alloy ◽  
Heat Treated ◽  
Elongation To Failure ◽  
Strength And Ductility

This work is to study the influence of heat treatment on microstrudture and mechanical properties of AZ31B magnesium alloy prepared by solid -state recycling. AZ31B magnesium alloy chips were recycled by hot extruding. Three different heat treatments were conducted for recycled alloy. Mechanical properties and microstructure of the recycled specimen and heat treated specimen were investigated. 300°C×2h annealing specimen exhibits finer grain due to static recrystallization, and microstructure of 400°C×2h annealing specimen becomes more coarse. 300°C×2h annealing treatment improves obviously strength and ductility of recycled alloy. Ultimate tensile strength of alloy decreases and elongation to failure increases after 400°C×2h annealing. Grain size, dislocation density and bonding of chips have an effect on the elongation of recycled materials. 190°C×8h ageing has no influence on microstructure and mechanical properties of recycled alloy.

Ternary Phase Formation in 95Pb-5Sn Flip-Chip Solder Bonds

1993 ◽  
Vol 323 ◽  
Author(s):  
Alan J. Mockler ◽  
Peter J. Goodhew ◽  
Elizabeth A. Logan
Keyword(s):  
Heat Treatment ◽  
Solid State ◽  
Ternary Phase ◽  
Flip Chip ◽  
Phase Distribution ◽  
Intermetallic Phases ◽  
Ternary Diagram ◽  
Solid State Diffusion ◽  
Analysis Techniques ◽  
State Diffusion

AbstractThe microstructure of 95Pb-5Sn flip-chip solder bonds deposited on Cr/Cu/Au metallisation pads has been studied using both light and electron analysis techniques. The presence of Sn-Cu- Au ternary intermetallic phases was detected within the Pb-rich matrix at significant distances from the originally deposited interface. The distribution of the phases present after the solder has undergone a reflow heat treatment can be interpreted using recent equilibrium ternary diagram data. An investigation was also made into the effects of various non-reflow heat treatments at carefully chosen temperatures, to qualitatively evaluate the extent of solid state diffusion and the resultant phase distribution.

Development of Adapted Heat Treatments for Steels out of the Semi-Solid State after Thixoforming

2008 ◽  
Vol 141-143 ◽  
pp. 695-700 ◽  
Author(s):  
Sebastian Dziallach ◽  
Wolfgang Püttgen ◽  
Wolfgang Bleck
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Solid State ◽  
Treatment Strategies ◽  
Solid Particles ◽  
High Wear Resistance ◽  
Hard Material ◽  
Current State ◽  
Suitable Heat Treatment ◽  
Semi Solid

The process of thixoforming incorporates a series of forming processes in the semi-solid state, which can be categorized between the conventional processes of forging and casting and combines the advantages of these processes. Thixoforming of steels in the semi-solid state, requires round, solid particles (globulites) in a liquid matrix which is deformed with low forming forces. In order to achieve laminar material flow and to produce segregation-free components, the material must fulfil diverse criteria. First, the melting interval should be as large as possible for an easy temperature regulation. Next, low solidus and liquidus temperatures are advantageous regarding tool loading. Additionally, thixoformable steels should show a melting behaviour that is finegrained and globular. Furthermore, these steels should possess low contents of intraglobular liquid phase fractions. This paper gives a survey of the current state of steel Thixoforming and deals with the development of adaptive heat treatment strategies. Regarding the structure formation and the development of suitable heat treatment strategies, the once semi-solid state yields new structures that can be applied in ways not previously possible with conventional hardening processes. New microstructures and up to date unknown better mechanical properties can be adjusted with an optimised heat treatment strategy. By this, new fields of application for thixo-materials can be entered and also advanced procedures for special applications can be established. For example the steel X210CrW12 leads to a very hard material with high wear-resistance, which can be used at higher temperatures than the conventional hardened material. In general, new generic microstructures after thixoforming results in unexpected favourable mechanical properties. Problems arise with respect to segregation and pores which resulting in inhomogeneous property distributions.

Solid-State NMR Study of Cysteine on Gold Nanoparticles

2010 ◽  
Vol 114 (42) ◽  
pp. 18109-18114 ◽  
Author(s):  
Anuji Abraham ◽  
Eugene Mihaliuk ◽  
Bharath Kumar ◽  
Justin Legleiter ◽  
Terry Gullion
Keyword(s):  
Gold Nanoparticles ◽  
Solid State ◽  
Solid State Nmr ◽  
Nmr Study
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