Development of environmentally oriented processes for obtaining articles from aluminum powders by powder metallurgy: Report 2. Development of environmentally safe technology for compaction of finely dispersed aluminum powders

2012 ◽  
Vol 53 (1) ◽  
pp. 101-104
Author(s):  
A. Yu. Kem
Keyword(s):  
Powder Metallurgy ◽  
Aluminum Powders ◽  
Safe Technology ◽  
Environmentally Safe ◽  
Dispersed Aluminum

Highly borated dispersed aluminum: experimental evaluation of its neutron-shielding properties

2021 ◽  
Vol 1 ◽  
pp. 67-72
Author(s):  
V.S. Yusupov ◽  
◽  
S.I. Tyutyunnikov ◽  
V.A. Artyukh ◽  
T.L. Enik ◽  
...  
Keyword(s):  
Morphological Analysis ◽  
Fibrous Composite ◽  
Comparative Assessment ◽  
Amorphous Boron ◽  
Neutron Shielding ◽  
Aluminum Powders ◽  
Absorbing Materials ◽  
Shielding Properties ◽  
Dispersed Aluminum ◽  
Scanning Electron

By the method of mechanical alloying, compaction and thermosynthesis of a mixture of amorphous boron and aluminum powders, a prototype of highly borated (~50 wt.%) dispersed boron-aluminum was obtained. A comparative assessment of the neutron-shielding properties of borated dispersed aluminum and fibrous boron-aluminum VKM Al-B under irradiation with neutrons with a flux density of 1.4·106 n/cm²·s with a fluence of 3·109 n/cm2 was carried out. Using optical and scanning electron microscopy, a morphological analysis of samples of dispersed-borated powdered aluminum and fibrous-composite boron-aluminum was carried out. It was found that in both materials the level of absorption of neutrons with energies of 0.02-0.05 eV is up to 99.5-99.95%. It is concluded that highly borated dispersed boron-aluminum supplements the line of known boron-containing neutron-absorbing materials with the possibility of using it up to temperatures of 500-700°C.

Structure and Properties of Electroless Cu and Ni-B Coated B4C Particle Dispersed Aluminum Composites by Powder Metallurgy Technique

2015 ◽  
Vol 830-831 ◽  
pp. 480-484
Author(s):  
J.P. Deepa ◽  
S. Abhilash ◽  
T.P.D. Rajan ◽  
C Pavithran ◽  
B.C. Pai
Keyword(s):  
Powder Metallurgy ◽  
Aluminum Matrix ◽  
Light Weight ◽  
Structure And Properties ◽  
Powder Metallurgy Technique ◽  
Coated Particles ◽  
Industrial Sectors ◽  
The Matrix ◽  
Electroless Process ◽  
Dispersed Aluminum

The widespread demand for light-weight materials in various emerging industrial sectors lead to the fabrication of aluminum- boron carbide composites. In this study, the B4C particles were coated copper and Ni-B through electroless process using formaldehyde and sodium borohydride respectively as reducing agents under optimized condition. The microstructural and hardness behavior were investigated for powder metallurgy processed 20 vol. % of B4C and coated B4C particles in the aluminum matrix. Microscopic observation revealed that coating improved the dispersibility of B4C particles in the matrix. The coated particles showed an increase in hardness and particle compaction with reduced porosity.

scholarly journals ULTRASONIC TREATMENT WHEAT STRAW IN THE ENVIRONMENT 1-BUTYL-3-METHYLIMIDAZOLIUM CHLORIDE

2017 ◽  
pp. 5-12
Author(s):  
Сергей (Sergei) Николаевич (Nikolaevich) Евстафьев (Evstaf'ev) ◽  
Куанг Кыонг (Kuang Kyong) Хоанг (Khoang)
Keyword(s):  
Wheat Straw ◽  
Ultrasonic Treatment ◽  
Treatment Time ◽  
Raw Materials ◽  
Total Yield ◽  
Experimental Conditions ◽  
Actual Problem ◽  
Safe Technology ◽  
Environmentally Safe ◽  
Degree Of Purification

The development of environmentally safe technology for processing lignocellulosic raw materials with the separation of polysaccharide and lignin fractions for subsequent use is an actual problem, a solution of which is possible when using ionic liquids as a solvent. To intensify the processing process, the possibility of using ultrasonic irradiation in the environment of 1-butyl-3-methylimidazolium chloride was studied. The results of the research of the influence of ultrasound power, temperature and processing time on the yield of fractions and the degree of purification of cellulose from impurities of hemicellulose and lignin are presented. It has been established that the use of ultrasound with a power of 10-50 W at processing of wheat straw in the environment of 1-butyl-3-methylimidazolium chloride promotes an increase in the degree of purification of cellulose from impurities, primarily hemicellulose, and a decrease in treatment time. The maximum degree of purification of cellulose was 68.1% and was received by irradiating with ultrasound 50 W at 140 °C within 15 min. It is shown that ultrasonic treatment of wheat straw in the environment of 1-butyl-3-methylimidazolium chloride provides an increase in the total yield of sugars of fermentolysis of polysaccharides of wheat straw by 4-5 times. The total yield of sugars of fermentolysis of the fractions of polysaccharides isolated in the experimental conditions was 83% of the theoretically possible.

scholarly journals ENVIRONMENTALLY SAFE TECHNOLOGY FOR STORAGE OF LIQUID WASTES OF MULTI-TONNEL PRODUCTION

2019 ◽  
Vol 17 (3) ◽  
pp. 62
Author(s):  
A.F. Arjanov ◽  
Yu.S. Kuznetsov ◽  
A.R. Khafizov ◽  
B.Yu. Chaplia ◽  
A.P. Shulgina
Keyword(s):  
Safe Technology ◽  
Environmentally Safe ◽  
Liquid Wastes

COMBUSTION OF A FROZEN MIXTURE OF BI-DISPERSED ALUMINUM-WATER POWDER

2020 ◽  
Author(s):  
V. A. Poryazov ◽  
◽  
A. Yu. Krainov ◽  
Keyword(s):  
Aluminum Powders ◽  
Dispersed Aluminum

The paper presents a model of combustion of a frozen mixture of nano- and micronsized aluminum powders with water.

scholarly journals Environmentally safe technology with the conversion of used cooking oil into soap

2021 ◽  
Vol 1869 (1) ◽  
pp. 012044
Author(s):  
S Rahayu ◽  
K A Pambudi ◽  
A Afifah ◽  
S R Fitriani ◽  
S Tasyari ◽  
...  
Keyword(s):  
Cooking Oil ◽  
Used Cooking Oil ◽  
Safe Technology ◽  
Environmentally Safe

scholarly journals Modeling the Structure and Processes of Heat Transfer in Beds of Aluminum Micro- and Nanopowders

2021 ◽  
Vol 2096 (1) ◽  
pp. 012164
Author(s):  
Yu P Zarichnyak ◽  
V A Ivanov ◽  
A A Marova ◽  
I N Nikolaev ◽  
V P Khodunkov
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Total Porosity ◽  
Granular Structure ◽  
Particle Sizes ◽  
Aluminum Powders ◽  
Wide Range ◽  
Significant Change ◽  
Dispersed Aluminum

Abstract A model of the structure and a method for calculating (forecasting) the thermal conductivity of beds from coarse to nano-dispersed aluminum powders are developed. A significant change in the thermal conductivity of the particles themselves was taken into account during the transition from the micro-meter to the nanometer-sized range of particle sizes. The thermal conductivity was calculated over a wide range of particle sizes, granular structure skeleton porosity, and total porosity of the beds.

An integrated and environmentally safe technology for extracting nonferrous and precious metals from scrap and waste of electronic engineering

Metallurgist ◽  
1996 ◽  
Vol 40 (5) ◽  
pp. 80-81
Author(s):  
V. A. Bryukvin ◽  
T. N. Vinetskaya ◽  
A. M. Levin ◽  
T. A. Makarenkova ◽  
G. I. Anufrieva
Keyword(s):  
Precious Metals ◽  
Safe Technology ◽  
Electronic Engineering ◽  
Environmentally Safe
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