The use of PAP-2 aluminum powder to fabricate powder composites: Peculiarities of technology, structure, and physicomechanical properties of composites. Part 2. Study of composite properties and structure

2017 ◽  
Vol 58 (2) ◽  
pp. 149-160
Author(s):  
D. A. Ivanov ◽  
A. I. Sitnikov ◽  
A. V. Ivanov ◽  
S. D. Shlyapin
Keyword(s):  
Aluminum Powder ◽  
Physicomechanical Properties ◽  
Powder Composites ◽  
Technology Structure ◽  
Composite Properties ◽  
Properties Of Composites

Effect of Al2O3 nanofibers on compaction, phase composition, and mechanical properties of ZrO2-based composites obtained by vacuum pressureless sintering

2021 ◽  
pp. 132-143
Author(s):  
A. A. Leonov ◽  
E. V. Abdulmenova ◽  
M. P. Kalashnikov ◽  
Jing Li
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Crack Resistance ◽  
Physicomechanical Properties ◽  
Relative Content ◽  
Pressureless Sintering ◽  
Vacuum Sintering ◽  
Tetragonal Modification ◽  
Different Content ◽  
Properties Of Composites

This work studies the effect of the relative content of Al2O3 nanofibers on the compaction, phase composition, and physicomechanical properties of composites based on ZrO2 obtained by free vacuum sintering. It was found that in the process of manufacturing composites, nanofibers are sintered into Al2O3 grains of complex, elongated shape, which form a solid, frame-reinforcing structure. The relative density of composites with 5 wt. % and 10 wt. % of nanofibers, decreases up to 95%. It is shown that in all sintered samples the tetragonal modification of ZrO2 acts as the main phase, and the different content of nanofibers affects the amount of cubic and monoclinic modifications of ZrO2. It was found that addition of 5 wt. % and 10 wt. % of Al2O3 nanofibers increases the microhardness of the composite by 11% and crack resistance by 46%.

scholarly journals Preparation of polymer gold nanoparticle composites with tunable plasmon coupling and their application as SERS substrates

Nanoscale ◽  
2019 ◽  
Vol 11 (42) ◽  
pp. 19884-19894 ◽  
Author(s):  
Samir A. Belhout ◽  
Frederico R. Baptista ◽  
Stephen J. Devereux ◽  
Anthony W. Parker ◽  
Andrew D. Ward ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Optical Tweezer ◽  
Plasmon Coupling ◽  
Sers Substrates ◽  
Nanoparticle Composites ◽  
Composite Properties ◽  
Properties Of Composites ◽  
Plasmon Ruler

The plasmonic properties of composites with controlled AuNP loading are found to be well described by a plasmon ruler equation, and Raman optical tweezer results show the SERS performance in the bulk is dominated by the discrete composite properties.

Sem and Tem Studies of NiAl2O4 Spinel Phase Distribution in Alumina Matrix

2013 ◽  
Vol 58 (2) ◽  
pp. 501-504 ◽  
Author(s):  
K. Konopka ◽  
L. Litynska-Dobrzynska ◽  
J. Dutkiewicz
Keyword(s):  
Fracture Toughness ◽  
Phase Distribution ◽  
Spinel Phase ◽  
Metal Particles ◽  
Alumina Matrix ◽  
Sem And Tem ◽  
Alumina Matrix Composite ◽  
Composite Properties ◽  
Almost Continuous ◽  
Properties Of Composites

Methods of enhancing of mechanical properties of ceramic-metal composites, particularly fracture toughness by introducing dispersed metal particles such as W, Mo, Ni, Al, etc to a ceramic matrix are well known. However, the dependence of the microstructures, especially interfaces, on the properties of composites is not well understood yet. Moreover, the ceramic-metal interfaces play a crucial role in tailoring the composite properties. In this paper we examine the alumina matrix composite with NiAl2O4 spinel phase and present the SEM and TEM studies of spinel distribution, size and crystallographic orientation. The composites were prepared by sintering Al2O3 and Ni powders below the melting point of Ni in argon. During the process of sintering the spinel phase appeared. It was not homogeneously distributed in the alumina matrix. The spinel phase areas were linked together and constituted an almost continuous form. We observed that the distribution and size of spinel influenced the fracture toughness of the composite.

scholarly journals Combined extrusion of SiC whisker/aluminum powder composites.

1988 ◽  
Vol 38 (10) ◽  
pp. 640-644
Author(s):  
Mitsuji HIROHASHI ◽  
Hiroshi ASANUMA ◽  
Osamu HAYAMA
Keyword(s):  
Aluminum Powder ◽  
Powder Composites

Mechanical, Morphological and Thermally Behaviors of Natural Rubber/Aluminum Powder Composites

2012 ◽  
Vol 501 ◽  
pp. 289-293
Author(s):  
Hui Jun Niu ◽  
Zhi Yi Zhang ◽  
Wei Guo ◽  
Yi Xue ◽  
Zhen Xing Yao
Keyword(s):  
Thermal Conductivity ◽  
Thermogravimetric Analysis ◽  
Natural Rubber ◽  
Aluminum Powder ◽  
Coupling Agent ◽  
Boundary Surface ◽  
Coupling Agents ◽  
Powder Filler ◽  
Powder Composites ◽  
Powder Content

Different content of aluminum powder was mixed into natural rubber. Aluminum powder was modified by different coupling agents via wet method, and the modified aluminum filler/NR composite was prepared. The mechanical properties, thermal conductivity and thermogravimetric analysis of the composites was investigated. The results showed that the best physical properties and thermal conductivity of composites were achieved with saline coupling agent Si-69, and Thermo decomposing temperature of 3%TM-38S matching composites improved evidently. SEM test indicated that boundary surface of aluminium fillers and rubber was obviously improved when aluminum powder was modified by coupling agent, which would result in preferable mechanical property. The result of Thermogravimetric analysis showed that after aluminum powder filler was modified by three coupling agents, thermo decomposing temperature and hot lost weight of composites rose obviously. With the increase of Al powder content the thermal conductivity improved greatly, Thermal conductivity of Al/NR composites lay between 0.25 and 0.47 W·m-1·K-1.

Sign in / Sign up

Export Citation Format

Share Document