scholarly journals Measurement of Particle Sizes in Composite Materials Containing Dispersed Particles

1971 ◽  
Vol 28 (317) ◽  
pp. 715-718,769
Author(s):  
Akira Nakayama ◽  
Tadashi Ohsawa ◽  
Kazuo Mihira
Keyword(s):  
Composite Materials ◽  
Particle Sizes ◽  
Dispersed Particles

Competing effect of dispersed particles on the generalized conductivity of composite materials

2020 ◽  
Author(s):  
Elena Romanovskaya ◽  
Svetlana Berestova ◽  
Natalya Romanovskaya
Keyword(s):  
Composite Materials ◽  
Dispersed Particles

scholarly journals Determination Of Power Loss In Fe-Based Soft Magnetic Composites

2015 ◽  
Vol 60 (2) ◽  
pp. 1411-1415 ◽  
Author(s):  
B. Jankowski ◽  
D. Kapelski ◽  
B. Ślusarek ◽  
J. Szczygłowski
Keyword(s):  
Particle Size ◽  
Magnetic Properties ◽  
Composite Materials ◽  
Particle Size Distribution ◽  
Power Loss ◽  
Particle Sizes ◽  
Soft Magnetic ◽  
Magnetic Composites ◽  
Soft Magnetic Composites

Abstract The magnetic properties of Fe-based composite materials with different particle sizes were investigated. The results of energy loss density were obtained from measurements of the static (DC) hysteresis cycles ranging from 0,2 to 1,4 T. In turn, the results of power loss density were obtained from measurements of the dynamic (AC) hysteresis cycles ranging from 20 to 400 Hz and at the maximum flux density 0,3; 0,9 and 1,3 T. Two sets of specimens was analyzed in the investigation: the specimens compacted under pressure of 800 MPa and hardened at 500°C and the specimens compacted under different pressure and hardened at 500°C. Specimens of the second set had the same density. The study confirmed the influence of particle size distribution on magnetic properties of Fe-based soft magnetic composites.

Effect of marble particle size and gamma irradiation on mechanical properties of polymer concrete

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Gonzalo Martínez-Barrera ◽  
Witold Brostow
Keyword(s):  
Particle Size ◽  
Elastic Modulus ◽  
Unsaturated Polyester ◽  
Compression Modulus ◽  
Dynamic Elastic Modulus ◽  
Polymer Concrete ◽  
Medium Size ◽  
Particle Sizes ◽  
Compressive Properties ◽  
Dispersed Particles

AbstractEffects of gamma radiation and the marble particle size on compressive properties and the dynamic elastic modulus of polymer concretes (PCs) were studied. The PCs had a composition of 30 % of unsaturated polyester resin and 70 wt. % of marble as aggregate. Different types of PC were developed with the combination of one, two or three marble-particle sizes. The materials were submitted to 5, 10, 50, 100 and 150 kGy of radiation doses. Both the compressive properties and the dynamic elastic modulus values depend on the combination of the marble-particle sizes and the applied radiation dose. Higher numbers of dispersed particles per unit volume provide more resistance to crack propagation. On the other hand, longer particles give more reinforcement. As a result of these two competing effects, medium size marble particles provide the highest compression modulus

scholarly journals STUDY THE EFFECT OF DIFFERENT ADDITIVES ON CRACK REPAIR EPOXY

2021 ◽  
Vol 25 (3) ◽  
pp. 74-80
Author(s):  
Baraa M. Kadhim ◽  
◽  
Khalid M. Oweed ◽  
Keyword(s):  
Silicon Carbide ◽  
Composite Materials ◽  
Silica Fume ◽  
Base Material ◽  
Composite Particles ◽  
Particle Sizes ◽  
Structural Elements ◽  
Concrete Crack ◽  
Mechanical And Physical Properties ◽  
Crack Repair

Using epoxy to repair concrete crack is widely used for restoring concrete structure. Epoxy is used as a base material in composite materials with fillers to improve mechanical and physical properties. The study aims to modify the properties of the epoxy by adding (alumina, silicon carbide, silica fume, pumice) and using This compound is for repairing concrete cracks. Each of the materials (alumina, silicon carbide, silica fume, pumice) were used to harden the epoxy in different proportions (5, 10, 15) by weight. It has particle sizes (45 - 65 μm), to prepare composite particles that can be used in construction applications. Further tests are performed to verify whether or not composites are suitable for applications. For the crack repair application, the resulting composites were tested for compression and bending. The resulting compound was applied to treat cracks in previously prepared concrete samples and several tests were performed (compression, bending, and UPV) to determine the effectiveness of this compound in treating cracks in the structural elements.

Research on the Low Temperature Degradation Resistance of TiN/3Y-TZP

2009 ◽  
Vol 79-82 ◽  
pp. 287-290
Author(s):  
Jing Sun ◽  
Bao Kun Han ◽  
Xing Hua Yang ◽  
Chuan Zhen Huang
Keyword(s):  
Particle Size ◽  
Composite Materials ◽  
Low Temperature ◽  
Aging Temperature ◽  
Particle Sizes ◽  
Aging Rate ◽  
The Matrix ◽  
Key Factor ◽  
The Relationship ◽  
In Virtue Of

The composite materials TiN/3Y-TZP, 3Y-TZP doped by TiN with different contents and particle sizes, were fabricated through the same hot-pressing techniques. Compared with 3Y-TZP, the low temperature degradation resistance of TiN/3Y-TZP aged at the temperature from 170°C to 350°C in air for 50 h was investigated in virtue of XRD and SEM in the experiment. For TiN/3Y-TZP and 3Y-TZP, the maximum aging rate all occurs at 220°C. The addition of TiN can availably improve the low temperature degradation resistance of 3Y-TZP at different aging temperatures, but cannot change the relationship between the aging rate and the aging temperature. For TiN/3Y-TZP, the matrix particle size is the key factor responsible for its low temperature degradation resistance.

scholarly journals Aluminium-based Composite Materials in Construction of Transport Means

2012 ◽  
Vol 23 (2) ◽  
pp. 87-96 ◽  
Author(s):  
Katica Miloš ◽  
Ivica Jurić ◽  
Pero Škorput
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Powder Metallurgy ◽  
Automotive Industry ◽  
Material Science ◽  
Particle Sizes ◽  
Ceramic Particles ◽  
The Past ◽  
Properties Of Materials ◽  
Size Of Particles

The implementation of the achievements in material science both through history as well as today, is directly indicated in the improvement of the efficiency of transport means which then results in the improvement of the technology of traffic and transport. Today’s requirements in the area of engineering materials intended for the construction of transport means impose reduction of mass as one of the fundamental criterion. Consideration of the technical and technological societies have been oriented towards light materials and the possibilities of their modification in order to substitute the past traditional heavy monoliths such as iron, steel, copper, etc. The potential has been recognised in the aluminium-based materials. Aluminium and its versions have been already widely used in automotive industry; however, their utility spectrum still avoids the tribologically sensitive purposes. This paper is focused on the possibility of producing such a material. Ceramic particles Al2O3 have been integrated into soft aluminium, various particle sizes and share, by powder metallurgy techniques. The mechanical properties of materials have been studied in dependence on the share, size of particles, type of Al/Al2O3, as well as the graphite addition. Al/Al2O3 composites have been produced without any problems and have shown satisfactory mechanical properties. KEYWORDS: reduction of transport means mass, aluminium-based composites, Al/Al2O3 composites

scholarly journals Studi penggunaan membran berslot untuk memproduksi emulsi minyak/air

2018 ◽  
Vol 9 (1) ◽  
pp. 19
Author(s):  
Putu Doddy ◽  
Ester Susanti ◽  
Debby Mariana
Keyword(s):  
High Speed ◽  
Particle Sizes ◽  
Feed Concentration ◽  
Uniform Size ◽  
Immiscible Liquids ◽  
Stable Particle ◽  
Dispersed Particles ◽  
Degree Of Stability ◽  
Size Of Particles ◽  
Degree Of Instability

Emulsion is dispersion system, which consist of two or more immiscible liquids. If this system is not stable, particle dispersed will form separate layer. The degree of instability will be greater if size of dispersed particles is not uniform. Generally, emulsion is produced by using high speed homogenizer, which will destruct the product. Some technology has been developed to overcome this problem. One of such technology is membrane emulsification, where the emulsion is flowed through the membrane so the size of particles will be smaller and more uniform. Symmetric membrane, which is used effectively to produce emulsion, has been used in this research. From the experiments, it has been proved that 28 microns membrane could produce emulsion, which has small and uniform size of particles. Emulsion with feed concentration of 10 % w/w and concentration of surfactant 3 % w/w has the highest degree of stability with particle sizes in the range of 3.5–13.5 microns. Fluxes were decreased if we use higher feed and surfactant concentration.Keywords: Emulsion, microfiltration, slotted membraneAbstrakEmulsi adalah dispersi dua atau lebih cairan yang tidak bercampur. Jika sistem ini tidak stabil, maka partikel terdispersi akan bergabung membentuk lapisan terpisah. Ketidakstabilan emulsi semakin tinggi jika ukuran partikel terdispersi besar dan distribusi ukurannya tidak seragam. Umumnya pembuatan emulsi dilakukan dengan pengadukan kecepatan tinggi yang merugikan jika bahan sensitif terhadap tekanan. Banyak cara dikembangkan untuk mengatasi hal ini, salah satunya adalah teknologi membran emulsifikasi, dimana emulsi dilewatkan melalui membran agar ukuran partikel terdispersi menjadi lebih kecil dan seragam sehingga emulsi stabil. Membran simetris yang efektif untuk memproduksi emulsi adalah membran mikrofiltrasi berslot seperti dalam penelitian ini. Hasil percobaan menunjukkan bahwa penggunaan membran berslot 28 m memberikan ukuran dan distribusi partikel yang kecil dan seragam. Emulsi minyak dalam air yang paling stabil adalah pada konsentrasi umpan 10% (b/b) dan konsentrasi surfaktan 3% (b/b) dengan ukuran partikel berkisar antara 3,5–13,5 µm. Fluks menurun bila konsentrasi umpan dan surfaktan semakin besar.Kata kunci: emulsi, mikrofiltrasi, membran berslot

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