Calculation of Force Parameters for Powder Material Hydrostatic Compaction

2018 ◽  
Vol 54 (7-8) ◽  
pp. 482-487
Author(s):  
M. B. Generalov ◽  
A. V. Slivinskii
Keyword(s):  
2017 ◽  
Vol 902 ◽  
pp. 60-64
Author(s):  
Judith Alejandra Velázquez Perez ◽  
Wilfrido Martínez Molina ◽  
Hugo Luis Chávez García ◽  
Elia Mercedes Alonso Guzmán ◽  
Rosalía Ruiz Ruiz

This research is an investigation about the use of powder material additions with mortars lime base for a possible implementation in construction and/or restoration of historical sites. Mortars were elaborated in laboratory conditions with a 1:2.5 in weight proportion. One of the proofs to which these mortars were submitted was the test of capillary absorption; this way, the influence of the materials added to powder in these mortars determined porosity. Mortars were made with different percentages of materials. These powder materials are brick manufacturing ash, quarry powder, clay and maize starch. The test was run during 350 to 700 days. It obtained better results with 700 days than with 350 days.


2003 ◽  
Vol 35 (1) ◽  
pp. 13-22
Author(s):  
V.Yu. Dorofeyev ◽  
YU.G. Dorofeyev

In the present paper the problems, connected with the formation of a powder material and its surface layers in conditions of chemical thermal treatment and impregnation with melt, combined with the use of mechanical loads at different process stages are examined. The new results of liquid phase influence on compaction of powder preforms, subjected to impregnation, are obtained. The presence of a liquid phase in preform surface layers can also be connected with the change of the materials chemical composition as the result of boronizing, siliconizing or other kinds of chemical thermal treatment.


2021 ◽  
Vol 877 (1) ◽  
pp. 012009
Author(s):  
Mohammed Qasim Kareem ◽  
Vladimir Dorofeyev

Abstract It is possible to expand the applications ranges of powder material products by enhancing the performance properties of these products in addition to their manufacturability and reliability together, it’s possible by materials structures modification. In this paper, the effect of fullerene (C60) additives to iron-based powder material has been studied. All samples produced by Hot-Forging (HF) powder materials technology. Green and HF density of the obtained samples calculated by volume / weight and Archimede’s principle, respectively. The effect of technological parameters on the microstructure of carbon steels’ samples was done by an ALTAMI MET-1M metallographic microscope. Tensile test executed by using of a universal testing machine UMM –5 and the microhardness (HV10) was measured by REICHERT hardness test machine. The results showed that the HF C60 steels’ samples had higher density and strength of 0.81 and 25%, respectively, with a good plasticity in comparison with graphite steels’ samples.


1996 ◽  
Vol 82 (7) ◽  
pp. 623-627
Author(s):  
Tadashi FUKUDA ◽  
Yoshihisa OHASHI ◽  
Koichi KOSHIRO

Author(s):  
Waqar Ahmed ◽  
Muhammad Ali Ghoto ◽  
Ubed-ur-Rehman Mughal ◽  
Abdullah Dayo ◽  
Mudassar Iqbal Arain ◽  
...  

The objective of this study is to evaluate the physicochemical parameters of Piroxicam 20 mg Tablet brands. A comparative qualitative research study was conducted for a period of six months. A total of five different brands of active Piroxicam tablets were selected. All samples were purchased from various local markets of Larkana Sindh. These collected samples were coded as PIX01, PIX02, PIX03, PIX04 and PIX05 for minimalism. Specific physicochemical quality control lab tests included Aesthetic test, Diameter and Thickness test, Weight variation, Mechanical strength and Friability test were performed on each sample according to standards and results were compared. Packing of all samples was observed according to GMP guidelines. Data was analyzed by using statistical software SPSS 24.00. Most of the brands were within official limits of United State Pharmacopeia (USP) except brand PIX05 showing variation in hardness test, whereas two brands PIX03 and PIX05 fail in friability test as well as powder material seen inside of blisters in aesthetic test. Dissolution test for each brand of Piroxicam was performed in which PIX02, 04 and 05 failed. It was concluded that from this study after in vitro physical evaluation of various brands of Piroxicam tablets, most of the brands are being manufactured under compliance of GMP guidelines as well as specifications described under USP. Traces of powder material inside of blister in aesthetic test and unsatisfactory result in friability and hardness test in same brand indicating the deviation of GMP guidelines and USP specification which may cause the out of specification result in chemical test.


Author(s):  
E. V. Ageeva ◽  
B. N. Sabel’nikov

The first appearance of tungsten-free hard alloys (TFHA) was noted in the early 30s of the last century, but they did not receive due attention and, accordingly, spread due to insufficient strength and were replaced by tungsten-containing alloys of such groups as VK, TC and TTK. However, the rapidly developing shortage of expensive tungsten pushed in the late 50s to return to the search for hard alloys, the composition of which does not include tungsten. Due to the growing demand for tungsten-free hard alloys, the problem of recycling their waste with the possibility of reuse is acute in the industry. The purpose of this work was to conduct x-ray spectral microanalysis (RSMA) of powder material (PM) obtained by electroerosive dispersion (EED) in ethyl alcohol from waste of a non-tungsten hard alloy of the KNT16 brand. The resulting powder material was examined using an energy-dispersion x-ray analyzer from EDAX, built into a scanning electron microscope "QUANTA 600 FEG". In the course of scientific research, the spectra of characteristic x-ray radiation on the surface of the experimentally obtained sample were obtained. The results obtained in the course of scientific research can be used to create environmentally friendly resource-saving processes for processing waste of tungsten-free hard alloys into powder materials.


2013 ◽  
Vol 379 ◽  
pp. 56-59 ◽  
Author(s):  
N.A. Saprykina ◽  
A.A. Saprykin

Mathematical relation between roughness of the surface layer of the sintered article and layer-by-layer laser sintering modes obtained from experiments conducted using copper powder material PMS-1. Authors suggest that split manufacturing process of an article and its inner part must be split to roughing, semi-finishing and finishing modes.


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