Experimental data on the rupturing pressure of porous powder metallurgy materials

This investigation studied the uptake of methylene blue from wastewater by normal and treated bentonites to evaluate the effects of acidification factors on removal efficiency. Hydrochloric, sulphuric and nitric acids were blended in accordance with the response surface methodology to prepare acidic agents. The normal clay was then mixed with the prepared solutions after drying in a laboratory oven. The set-up provided controllable conditions for producing nano-porous powders for which the residence time and temperature were changed. The removal efficiency of the treated powders was assessed by defining an adsorption ratio and determining the optimal composition for acidic agent. Based on the statistical theory and experimental data, nitric acid is a suitable agent for manufacturing porous material to remove methylene blue from wastewater. In addition, the Brunauer–Emmett–Teller method, X-ray diffraction and Fourier transform infrared spectroscopy techniques were applied to identify the structural changes. The experimental data obtained from the batch tests were analysed by a new kinetic model which predicted the data variation with higher regression coefficients and lower relative errors. The proposed procedure can be an important tool in optimising the acidification conditions for manufacturing a nano-porous powder with maximal removal efficiency.

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Influence of the Microstructure on the U1-yAmyO2-x (y= 0.1; 0.15) Pellet Macroscopic Swelling

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.73.104 ◽

2010 ◽

Vol 73 ◽

pp. 104-108 ◽

Cited By ~ 11

Author(s):

Damien Prieur ◽

Aurélien Jankowiak ◽

Caroline Leorier ◽

Nathalie Herlet ◽

Louis Donnet ◽

...

Keyword(s):

Experimental Data ◽

Powder Metallurgy ◽

Room Temperature ◽

Powder Metallurgy Process ◽

Metallurgy Process ◽

Α Particles

This work is devoted to the study of the geometrical stability in time of UyAm1-yO2-x pellet due to self-irradiation at room temperature. Dense and tailored porosity U1-yAmyO2-x (y=0.10; 0.15) compounds were fabricated by a powder metallurgy process. Up to 3.4.1017 α particles/g, an increase in the diameter of 0.9% was observed for the dense compounds while for the tailored porosity material a diameter increase of 0.4% was observed. Swelling laws have been established from the experimental data.

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The Use of Transient Liquid Phases in Powder Metallurgy

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1016.69 ◽

2021 ◽

Vol 1016 ◽

pp. 69-76

Author(s):

Herbert Danninger ◽

Raquel de Oro Calderon ◽

Christian Gierl-Mayer

Keyword(s):

Powder Metallurgy ◽

Liquid Phase ◽

Transient Liquid Phase ◽

Liquid Phase Sintering ◽

Porous Powder ◽

Material Transport ◽

Liquid Phases ◽

Short Period ◽

Constant Quantity ◽

Transient Liquid Phases

Liquid phase sintering is most widely known in its variant „persistent liquid phase sintering“, in which case the liquid phase is present in constant quantity during the entire isothermal period. There is however also the variant „transient liquid phase“, the melt being present only for a short period in the first stage of sintering and then solidifying through diffusional processes. In this presentation, the preconditions for both variants are presented, in particular with regard to the starting materials. The benefits of transient liquid phases are described, both for sintering – to accelerate material transport, contact formation and microstructural homogenization compared to standard solid state sintering – and for transient liquid phase bonding, a brazing variant which is an attractive method for joining porous powder compacts. Both techniques are highly useful in particular for ferrous powder metallurgy precision components, etc.

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Influence of the skin and pinch effects on formation of the structure of porous powder metallurgy materials in electropulse sintering

Soviet Powder Metallurgy and Metal Ceramics ◽

10.1007/bf00794023 ◽

1990 ◽

Vol 29 (11) ◽

pp. 889-893 ◽

Cited By ~ 2

Author(s):

V. M. Kaptsevich ◽

K. E. Belyavin ◽

D. V. Min'ko ◽

A. A. Gurevich ◽

L. L. Maksimenko

Keyword(s):

Powder Metallurgy ◽

Porous Powder

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Simulation of Container Design for Powder Metallurgy Titanium Components through Hot-Isostatic-Pressing

Materials Science Forum ◽

10.4028/www.scientific.net/msf.817.610 ◽

2015 ◽

Vol 817 ◽

pp. 610-614 ◽

Cited By ~ 2

Author(s):

Rui Peng Guo ◽

Lei Xu ◽

Jie Wu ◽

Zheng Guan Lu ◽

Rui Yang

Keyword(s):

Experimental Data ◽

Finite Element ◽

Powder Metallurgy ◽

Alloy Powder ◽

Hot Isostatic Pressing ◽

Fem Simulation ◽

Isostatic Pressing ◽

Finite Element Calculations ◽

Near Net Shape ◽

Simulation Results

Shima model and two different kinds of container designs were described. The final geometries of powder metallurgy (PM) preforms were predicted by using finite element method. Several PM Ti-6Al-4V parts were fabricated through a hot isostatic pressing route for comparison with the prediction from the modelling. FEM simulation can be used for shrinkage prediction of powder during HIPing process. The finite element calculations agreed well with the experimental data for shrinkage of the titanium alloy powder under HIPing. The simulation results is helpful to fabricate near-net-shape PM titanium parts.

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