X-ray Analisis of the Powder of Micro- and Nanometer Fractions, Obtained from Wastes of Alloy T15K6 in Aqueous Medium

The results of conducting X-ray analysis of the powders, obtained by the electroerosive dispersing of hard alloy wastes brand T15K6 in distilled water are presented. It was established experimentally, that the obtained powder particles consist of the following main phases: W, TiC, W2C, WC, Co and CoO

Studing Tungsten-containing Electroerosion Powders and Alloys Synthesized from Them

The results of the X-ray spectral microanalysis of the powder obtained using electroerosion dispersion of tungsten-containing wastes in distilled water, and the alloy powder synthesized from this powder are presented in the article. It is shown that the basic elements both in the powder obtained using electroero-sion dispersion of tungsten-containing wastes in distilled water and in the synthesized alloy are tungsten, molybdenum, iron, oxygen and carbon. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3634

Wear-resistant Coatings From Electroerosive Micro- and Nanofraction Powders

The results of studies of relative stability of the cutting tool, restoration and strengthening by electricspark alloying with the using as electrode material the electroerosive tungsten powders are demonstrated. The efficiency of their application is shown

Wear-resistant Coatings From Electroerosive Micro- and Nanofraction Powders

The results of studies of relative stability of the cutting tool, restoration and strengthening by electricspark alloying with the using as electrode material the electroerosive tungsten powders are demonstrated. The efficiency of their application is shown

Influence of polychemotherapy on the morphology of metastases and kidney of resistant RLS-bearing mice

Aim: Polychemotherapy (PCT), widely used for the antitumor treatment has a pronounced toxic effect on the organism, and its cytostatic effect sometimes is canceled by multidrug resistance of a neoplasia. Comprehension of the nature and development of pathological changes caused by the PCT during the treatment of cancer is very important to improve the efficiency of the therapy and to clarify the mechanisms of tumor-host interactions. This study was aimed to examine PCT impact on kidney cells and tissues in mice with transplanted resistant lymphosacroma (RLS) and to analyze morphology of metastases of the tumor in kidney during PCT. Materials and Methods: Male mice CBA/LacSto (55 animals) were intramuscularly implanted in the right hind paw by 105 cells/ml of tumor RLS (a diffuse large B-cell lymphosarcoma) with multi-drug resistance (MDR) phenotype. Mice received combination of cyclophosphamide (50 mg/kg), oncovin (0.1 mg/kg), hydroxydaunorubicin (4 mg/kg), and prednisone (5 mg/kg) accordingly to CHOP scheme each 7 days after inoculation of the tumor. The kidneys were sampled on days 1, 3 and 7 after each series of injection of PCT preparations and processed for light and electron microscopy, immunohistochemical analysis of Ki-67 and Apaf-1 proteins also was performed. Results: Tumor RLS produced metastases comprised of small cells in the kidneys of mice after 8 days post inoculation. Application of PCT resulted in destruction of small-cell metastases and development of many large-cell metastases in kidney. Application of PCT induced the development of prominent damage of nephron cells, primarily in S3 segments of proximal tubules. Even one series of PCT caused reduction of basal plasma folds in these cells and alteration of mitochondria. Damage of proximal tubules and involvement of distal tubules, renal bodies and interstitial tissue in the pathologic process, increased during the experiment. This work presents the description of morphological changes in kidney as well as of the tumor metastases under PCT influence. Conclusion: The obtained data should be considered while designing of remedies for recovery of internal organs functions after antitumor PCT

Conducting a microscopic analysis of the powders obtained by electroerosion dispersion of waste of steel X13

Alloyed steels and alloys containing a significant amount of non-ferrous metals are used for the manufacture of critical parts for various purposes, since it is the alloyed steels and alloys that possess a complex of high physicomechanical and other properties. Chromium is the most common alloying element. Chromium alloyed steel has increased strength, hardness, wear resistance, corrosion resistance in aggressive and oxidizing environments. The presence of chromium increases the hardenability of steel. The process of obtaining powder materials by the method of electroerosion dispersion favorably differs by the possibility of obtaining powders even from very hard and refractory materials. In the case of grinding material with this method, the only important criterion is the electrical conductivity of the material being ground. Worn parts and other scrap can be used as feedstock during the process. The purpose of the study is to investigate the powder, obtained from the wastes of chromium-containing steels. Thanks to the study of the samples of the used powder, on modern devices, results were obtained, indicating that the chromium-containing powder, obtained by the method of electroerosive dispersion, can be reused to restore and strengthen machine parts

Investigation of the Microstructure of a Sintered Sample Obtained from Powder Steel X13

This article presents the results of a study of the microstructure of a sintered sample made of alloy X13 electroerosive materials obtained in butyl alcohol. It has been established that during the sintering of electroerosive materials made of alloy X13 by the method of spark plasma sintering, the main elements on the surface of the particles are Fe, Cr, Mn, and the particles have a generally regular spherical shape

X-ray diffraction analysis of a sintered product made of electroerosive chromium-containing powder

This article presents the results of x-ray diffraction analysis of a sintered sample made of X13 alloy electroerosive materials obtained in butyl alcohol. It was found that in the sintered sample by the method of spark plasma sintering from alloy X13, the main phases are Fe, Cr, and FeNi3

X-ray spectral microanalysis of hardened additive products made of electroerosion cobalt-chromium alloys

This article presents the results of an X-ray spectral microanalysis of cobalt-chromium alloys based on particles of the of the tungsten nickel iron alloy dispersed by electric erosion, obtained in alcohol. It has been experimentally proved that a part of oxygen is present in the cobalt-chromium alloy of particles of the cobalt-chromium-molybdenum alloy dispersed by electric erosion. All other elements are distributed relatively evenly over the volume of particles. It is shown that Co, Cr and Mo are the main elements of the (CoCrMo) alloy dispersed by electric erosion