Powder Mixing
Mostrando 1-12 de 44 artigos, teses e dissertações.
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1. Preparation of novel blue phosphate pigments in imitation of turquoise
Resumo Como novo pigmento azul, vários fosfatos hidratados de cobre e alumínio imitando turquesa, CuAl6(PO4)4(OH)8.4H2O, foram preparados misturando solução de nitrato de cobre, solução de nitrato de alumínio, ácido fosfórico e solução de hidróxido de sódio. Amostras com composição química semelhante à turquesa foram preparadas. Os pós obti
Cerâmica. Publicado em: 14/11/2019
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2. Powdered beverage mix with acerola pulp, whey and maltodextrin
RESUMO A mistura de polpa de acerola com soro lácteo, subproduto da indústria de laticínios, conduziu a base deste trabalho, cujo objetivo foi desenvolver uma bebida composta em pó de polpa de acerola, soro lácteo e maltodextrina (dextrose equivalente 20). Para determinação das proporções da mistura foi utilizado um delineamento de misturas de tipo
Rev. Ciênc. Agron.. Publicado em: 04/11/2019
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3. Investigación de diseños de mezcla para producir Ultra High Performance Fiber Reinforced Concrete (UHPFRC) usando ANOVA
ABSTRACT An experimental study is presented to produce Ultra High Performance Fiber Reinforced Concrete (UHPFRC) including industrial waste in the mix, and determine the average compressive strength. The study includes factor arrangements to perform analysis of variance using ANOVA. The controllable factors were: (i) age of the sample; (ii) granulometry of t
Matéria (Rio J.). Publicado em: 10/06/2019
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4. Semi-solid Sintering of Ti6Al4V/CoCrMo Composites for Biomedical Applications
A composite of Ti6Al4V reinforced with CoCrMo particles is fabricated by conventional powder metallurgy and semi-solid sintering. Composites are fabricated by mixing 20% wt. of CoCrMo reinforcing particles into the Ti6Al4V matrix. Sintering is studied by dilatometry tests between 1050 and 1130 °C and compact characterization is performed by SEM and XRD. Mic
Mat. Res.. Publicado em: 31/01/2019
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5. Densification and microstructure of Si3N4-TiN ceramic composites
Abstract Silicon nitride is a ceramic material widely used in various structural applications at high temperatures owing to its excellent combination of mechanical and thermal properties. To increase the application of Si3N4, many researches have been developed to improve its fracture toughness and processing conditions. In this study, the sintering and micr
Cerâmica. Publicado em: 2019-01
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6. Heat Treatment of Sintered Valve Seat Inserts
The characterization of sintered valve seat inserts (VSIs) after being subjected to different heat treatment operations has been carried out. The VSIs were obtained from three different alloys by mixing iron powder with AISI M3:2, AISI M2 high-speed steels, and AISI D2 tool steel. After sintering, the VSI were quenched in air followed by double tempering at
Mat. Res.. Publicado em: 02/08/2018
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7. Thermal Properties and Kinetics of Al/α-MnO2 Nanostructure Thermite
In this work, thermal properties and kinetics of Al-nanoparticles/α-MnO2 nanorods thermite were reported. The α-MnO2 nanorods were synthesized using a hydrothermal method and were characterized by X-ray powder diffraction (XRD) and X-ray photoelectron spectra (XPS), then combined with Al nanoparticles based on the ultrasonic mixing method to prepare the na
J. Braz. Chem. Soc.. Publicado em: 2018-02
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8. Obtaining and Characterization of W-Cu Composite Powder Produced by Mixing and Sintering of Ammonium Paratungstate (Apt) and Copper Nitrate
The objective of this work is obtaining W-30 wt% Cu composite powder from ammonium paratungstate hydrated (APT) and hydrated copper nitrate and investigating the influence of some production process parameters of W- 30 wt% Cu in particles form which results in high sinterability and densification of W-30 wt% Cu composite. To achieve this objective, the powde
Mat. Res.. Publicado em: 18/05/2017
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9. Effective low-energy mixing procedure to develop high-fluidity cementitious pastes
Preparing a high fluidity paste is a major step in ultra-high performance concrete (UHPC) development with respect to its self-compacting ability as well as its ultra-high strength. In this regard, some experiments have been carried out in order to study various superplasticizer (SP) addition methods and times. Among these procedures, stepwise and delayed me
Matéria (Rio J.). Publicado em: 2016-03
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10. Study of the TiC Coating on Powder Metallurgy Diamonds Tool's Performance
Some diamond tools use iron in their composition, and it is known that iron is a strong catalyst for the graphitization of diamonds. This graphitization occurs mainly during the processing of composite materials - conventional sintering or hot pressing, and during cutting operations. This work studies the effect of TiC coating on diamond, on structure, micro
Mat. Res.. Publicado em: 2015-06
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11. Sinterability and microstructure evolution during sintering of ferrous powder mixtures
The present work is focused on ferrous powder metallurgy and presents some results of a development of a suitable masteralloy for use as an additive to iron powder for the production of sintered steels. The masteralloy was produced by melting a powder mixture containing approximately Fe + 20% Ni + 20% Mn + 20% Si + 1% C (wt%), in order to obtain a cast bille
Mat. Res.. Publicado em: 28/05/2013
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12. Parâmetros de monitoramento na produção industrial de componentes em zircônia parcialmente estabilizada com óxido de magnésio / Monitoring parameters for the industrial production of pieces made of magnesia-partially-stabilized zirconia
Zirconia has been widely applied on production of structural components, mainly due to its great mechanical properties. However, these properties are associated to the zirconia tetragonal and cubic phases, which are stable only on high temperatures on pure material, being necessary doping the material with some oxides to keep these phases at ambient temperat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2012