Determination of the evacuation time and permeability of powder materials

1978 ◽  
Vol 17 (9) ◽  
pp. 732-735
Author(s):  
L. A. Arbuzova ◽  
R. V. Tyul'pakova ◽  
N. E. Chernykh
Keyword(s):  
Powder Materials ◽  
Evacuation Time

Determination of the corrosion rate of powder materials by electrochemical methods

2011 ◽  
Vol 47 (7) ◽  
pp. 921-925 ◽  
Author(s):  
V. I. Kichigin ◽  
O. M. Perel’man ◽  
A. I. Rabinovich ◽  
N. V. Bezmaternykh ◽  
O. P. Koshcheev
Keyword(s):  
Corrosion Rate ◽  
Electrochemical Methods ◽  
Powder Materials

scholarly journals Characterization and Applications of Silver Sulphide Based Membrane Electrodes

1970 ◽  
Vol 7 (7) ◽  
pp. 19-23 ◽  
Author(s):  
A Rajbhandari ◽  
AP Yadav ◽  
K Manandhar ◽  
RR Pradhananga
Keyword(s):  
Silver Chloride ◽  
Silver Halide ◽  
Ion Selective Electrode ◽  
Ion Selective Electrodes ◽  
Powder Materials ◽  
Membrane Electrodes ◽  
Selective Electrode ◽  
Sulphide Ions ◽  
Silver Sulphide

The polycrystalline materials obtained by co-precipitation of silver sulphide and appropriate silver halide are used to prepare silver sulphide based membrane electrodes selective to the silver, chloride, bromide, iodide, and sulphide ions. The powder materials are characterized by x-ray diffraction, SEM equipped with EDAX. These membrane electrodes are found to give Nernstian response with the appropriate ions in the concentration range from 1x10-1 to 1x10-5 M. The performance of these home made electrodes is at par with the commercial electrodes. The electrodes have been successfully used for the quantitative determination of chloride, bromide iodide, silver, and sulphide ions and also for the determination of thiamine in pharmaceutical preparations. For developing countries like Nepal, who can not afford to procure high cost commercial ion selective electrodes, these home made ion selective electrodes are especially appealing since the electrode can be fabricated with ease in low cost and the electrode is well behaved and sufficiently accurate for the analysis with ion selective electrodes. Key words: Ion selective electrode; Home made ion selective electrode; Silver sulphide; Thiamine; Vitamin B1. DOI: 10.3126/sw.v7i7.3818 Scientific World Vol.7(7) 2009 pp.19-23  

DETERMINATION OF PALLADIUM IN POWDER MATERIALS OF ELECTRICAL PRODUCTS AFTER THEIR SERVICE LIFE EXHAUSTING

2015 ◽  
Vol 0 (1) ◽  
pp. 11-11
Author(s):  
V.I. Titov ◽  
◽  
N.V. Gоundobin ◽  
L.V. Pilipenko ◽  
◽  
...  
Keyword(s):  
Service Life ◽  
Powder Materials

scholarly journals Application of ultrasonic testing method for determining defects of hot-deformed powder materials

2019 ◽  
Vol 298 ◽  
pp. 00146
Author(s):  
Maxim S. Egorov ◽  
Andrey A. Atrokhov ◽  
Evgeniy A. Nedostup ◽  
Ekaterina V. Vasilyeva
Keyword(s):  
Hot Stamping ◽  
Side Surface ◽  
Powder Materials ◽  
Friction Forces ◽  
Testing Method ◽  
Peripheral Surface ◽  
Deformed State ◽  
Hot Plasticity ◽  
Elastic Characteristics

The article is devoted to the analysis of elastic and plastic characteristics of composite materials during hot stamping. The purpose of this work is to offer optimal conditions for hot plasticity of composite porous material with determination of temperature conditions of hot stamping excluding the appearance of defects in the structure. Production of details of the difficult form by method of hot stamping from preparations of the cylindrical form is followed by development of barrel on a peripheral surface. Sludge sintered porous blanks, and sediment compact material, accompanied by a nonuniform height lateral deformation. In connection with the action of friction forces on the contact surfaces, this leads to the formation of a “barrel”. The heterogeneity of the deformed state is associated with the appearance of tangential tensile stresses on the free surface of the workpiece. If they exceed some critical degree of transverse deformation, cracks appear on the side surface, which leads to gas saturation (oxidation) of the inner layers of the forging, to the ingress of grease into them and its pressing into the volume of the part during hot stamping. In the end, this significantly reduces the properties of hot-stamped parts. Conclusion: the methods of determining the elastic characteristics depending on the geometric parameters of the workpieces, the applied strain energy, body density and temperature dependence of the plasticity characteristics of the hot deformation of the powder material are сonsidered.

scholarly journals The Influence Of The Temperature Of Liquid Nitrogen On The Physical Properties Of Powder Magnetic Composites

2015 ◽  
Vol 60 (2) ◽  
pp. 1323-1326 ◽  
Author(s):  
D. Kapelski ◽  
B. Jankowski ◽  
M. Przybylski ◽  
B. Ślusarek
Keyword(s):  
Physical Properties ◽  
Liquid Nitrogen ◽  
Permanent Magnets ◽  
Liquid Nitrogen Temperature ◽  
Powder Materials ◽  
Soft Magnetic ◽  
Compression Moulding ◽  
Magnetic Composites ◽  
Materials Research

Abstract The paper presents the physical properties of soft magnetic iron composites and Nd-Fe-B bonded permanent magnets measured at room temperature and at liquid nitrogen. The objective of research was a determination of influence of liquid nitrogen temperature on the magnetic properties, resistivity and mechanical properties of different powder magnetic materials. Research was carried out for three powder materials: soft magnetic, i.e. Somaloy 700, AncorLam and hard magnetic powder MQP-B used for production of bonded magnets. Composite specimens were prepared by compression moulding technology.

Determination of the maximum rolling speed of powder materials

1976 ◽  
Vol 15 (10) ◽  
pp. 750-753
Author(s):  
I. P. Shomin ◽  
P. V. Klassen ◽  
I. M. Kuvshinnikov
Keyword(s):  
Rolling Speed ◽  
Powder Materials

scholarly journals The use of a cone calorimeter for the preliminary determination of the extinguishing efficiency of bulk materials

2018 ◽  
Vol 247 ◽  
pp. 00060
Author(s):  
Bernard Król ◽  
Marek Konecki ◽  
Mariusz Klakus ◽  
Barbara Ościłowska
Keyword(s):  
Weight Loss ◽  
Cone Calorimeter ◽  
Comparative Evaluation ◽  
Human Factor ◽  
Powder Materials ◽  
Bulk Materials ◽  
Dry Powders ◽  
Physical Effects ◽  
Dry Chemicals

Determining the extinguishing effectiveness of extinguishing agents against solid fires is difficult. This is mainly due to the large variety of combustible materials. These difficulties also concern the determination of the effectiveness of various extinguishing agents for gas, fat and metal fires. However, extinguishing tests for liquid fires are defined very precisely. The tests of the effectiveness of powder materials, such as extinguishing powders, are based on relatively simple and methods used to extinguishers testing. It does not eliminate the very significant impact of the human factor on the test effect. A cone calorimeter was used for comparative evaluation of the extinguishing efficiency of bulk materials. For this purpose, bulk materials e.g. salt, sand and dry chemicals were applied to the surface of standard pine wood samples and the differences in their flammability were examined. Based on the analysis of HRR, weight loss curves and time to achieve flame combustion, it was found that a cone calorimeter can be used to pre-assess the effectiveness of extinguishing the dry powders and dry chemicals for solid fires. There were clear differences between chemical and only physical effects.

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