Study of temperature and size dependent elastic constant of LiNbO3 nano particles embedded in Al-metal matrix

2014 ◽  
Vol 1 (1) ◽  
pp. 11-28
Author(s):  
Sanjay Srivastava ◽  
◽  
V. Shamanin
Keyword(s):  
Elastic Constant ◽  
Metal Matrix ◽  
Nano Particles ◽  
Size Dependent

scholarly journals A Novel Route for Development of Bulk Al/SiC Metal Matrix Nanocomposites

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Payodhar Padhi ◽  
Sachikanta Kar
Keyword(s):  
Metal Matrix ◽  
Spray Deposition ◽  
Aluminum Matrix ◽  
Weight Percent ◽  
Nano Particles ◽  
Solidification Processing ◽  
Ultrasonic Probe ◽  
Metal Matrix Nanocomposites ◽  
Sic Particulates ◽  
Matrix Nanocomposites

Addition of nano particles, even in quantities as small as 2 weight percent can enhance the hardness or yield strength by a factor as high as 2. There are several methods for the production of metal matrix nanocomposites including mechanical alloying, vertex process, and spray deposition and so forth. However, the above processes are expensive. Solidification processing is a relatively cheaper route. During solidification processing, nano particulates tend to agglomerate as a result of van der Waals forces and thus proper dispersion of the nano particulate in metal matrix is a challenge. In the present study a noncontact method, where the ultrasonic probe is not in direct contact with the liquid metal, was attempted to disperse nanosized SiC particulates in aluminum matrix. In this method, the mold was subjected to ultrasonic vibration. Hardness measurements and microstructural studies using HRTEM were carried out on samples taken from different locations of the nanocomposite ingot cast by this method.

scholarly journals Comparison of cutting mechanism when machining micro and nano-particles reinforced SiC/Al metal matrix composites

2018 ◽  
Vol 203 ◽  
pp. 636-647 ◽  
Author(s):  
Xiangyu Teng ◽  
Wanqun Chen ◽  
Dehong Huo ◽  
Islam Shyha ◽  
Chao Lin
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Nano Particles ◽  
Matrix Composites ◽  
Cutting Mechanism

Surface integrity and Flank wear response under Pure coconut oil-Al2O3 nano MQL turning of Al-7079/7wt.%-TiC in-situ metal matrix composites

2021 ◽  
pp. 1-21
Author(s):  
Sujith S V ◽  
Rahul Mulik
Keyword(s):  
Metal Matrix ◽  
Coconut Oil ◽  
Nano Particles ◽  
Cutting Fluids ◽  
Matrix Composites ◽  
Dry Machining ◽  
Cutting Zone ◽  
Cutting Zone Temperature ◽  
Zone Temperature

Abstract Major cooling and lubricating properties such as conduction, convection and lubricant stability at higher temperature are improvised by the addition nano particle into metal cutting fluids. The present investigation is mainly focused into the effects of pure coconut oil (PC) based nano-fluids through minimum quantity lubrication (MQL) on oblique cutting performance of Al-7079/7wt.%-TiC in-situ reinforced metal matrix composites (MMCs). The machining performance has been evaluated under dry machining, pure coconut oil (PC)-MQL and MQL by varying 0.1 % to 0.6 vol. % nano particles into PC. The performance of nano cutting fluids were compared to dry machining and PC machining in terms of cutting forces, tool wear, cutting zone temperature, and surface roughness respectively. It has found that, compared to dry and PC-MQL machining, the performance of nano MQL machining was superior among all cutting conditions. However, above 0.4 % nano particles, the nano MQL performance was degraded drastically which leads to the substantial increment in cutting forces, tool wear, surface roughness and cutting zone temperature respectively.

Determination of X-ray Elastic Constants in a Ti-14Al-21Nb Nb Alloy and a Ti-14Al-21Nb/SiC Metal Matrix Composite

1990 ◽  
Vol 34 ◽  
pp. 689-698 ◽  
Author(s):  
J. Jo ◽  
R. W. Hendricks ◽  
W. D. Brewer ◽  
Karen M. Brown
Keyword(s):  
Residual Stress ◽  
Plastic Deformation ◽  
Elastic Constant ◽  
Theoretical Calculation ◽  
Metal Matrix Composite ◽  
Elastic Constants ◽  
Metal Matrix ◽  
Intrinsic Value ◽  
X Ray

Residual stress values in a material are governed by the measurements of the atomic spacings in a specific crystallographic plane and the elastic constant for that plane. It has been reported that the value of the elastic constant depends on microstructure, preferred orientation, plastic deformation and morphology [1], Thus, the theoretical calculation of the elastic constant may deviate from the intrinsic value for a real alloy.

scholarly journals Effective Casting Technique of Nano-Particles Alloyed Austenitic Stainless Steel

Metals ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1287
Author(s):  
Ana Kračun ◽  
Fevzi Kafexhiu ◽  
Franc Tehovnik ◽  
Bojan Podgornik
Keyword(s):  
Metal Matrix ◽  
Casting Process ◽  
Nano Particles ◽  
Homogeneous Distribution ◽  
Steel Matrix ◽  
Production Methods ◽  
Casting Technique ◽  
Dispersion Agent ◽  
The Matrix ◽  
Reinforced Steel

In recent decades, considerable efforts have been made in the production of steel and the modification of its microstructure on the nano-scale in order to improve its mechanical properties. One possibility is through nano-particles incorporation and reinforcement. While typical production methods for Metal Matrix nano-Composites (MMnCs) are difficult and expensive, the main drawback of the casting method is the agglomeration of the nano-particles and a poor interface between the nano-particles and the metal matrix. Therefore, the aim of this study was to investigate the potential of adding nano-particles as reinforcement elements through the conventional liquid-metal casting process. The investigation was focused on the various approaches to the modification and addition of nano-particles in the melt, as well as the influence of particle concentration and size on their homogeneity and distribution within the steel matrix. The results show that also in the case of the conventional casting process, it is possible to produce a reinforced steel-matrix nano-composite with a homogeneous distribution of the Al2O3 nano-particles in the matrix. However, in order to obtain a homogeneous distribution of nano-particles in the steel matrix, a dispersion agent is required.

Synthesis of Self-Assembly Au Nano-Particles Based on Sodium Citrate-Tannin Reduction Method

2011 ◽  
Vol 311-313 ◽  
pp. 461-465
Author(s):  
Dau Chung Wang ◽  
Shinn Hwa Chen ◽  
Gen You Chen ◽  
Ken Yen Chen ◽  
Cheng Hsien Tsai
Keyword(s):  
Particle Size ◽  
Self Assembly ◽  
Reduction Method ◽  
Low Cost ◽  
Trisodium Citrate ◽  
Nano Particles ◽  
Size Dependent ◽  
Biological Toxicity ◽  
The One ◽  
Au Nano Particles

Recently, self-assembly synthesis of metal nano-particles has attracted great interest due to its unique size dependent properties. In this study, an easy synthesis would be developed to form Au nano-particles which are without toxicity. The Au particles could be applied in biological and biological toxicity experiments. Some phenomena could be discovered in this paper. First, the concentration ratio of Au and trisodium citrate would be adjusted to control the Au nano-particles size. And the particle size is limited because of the size dependent energy would be discovered in this paper. The minimum particle size is also found. The one phase liquid reduction method is easy and without toxicity, it is low-cost, high-throughput, and suitable to be applied in biological and biological toxicity studies.

Evidence of size-dependent effect of silica micro- and nano-particles on basal and specialized monocyte functions

2017 ◽  
Vol 8 (12) ◽  
pp. 1035-1049 ◽  
Author(s):  
Mauricio C De Marzi ◽  
Martín Saraceno ◽  
Romina Mitarotonda ◽  
Marcos Todone ◽  
Marisa Fernandez ◽  
...  
Keyword(s):  
Nano Particles ◽  
Dependent Effect ◽  
Size Dependent
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