Plasma Surface Engineering
Mostrando 1-11 de 11 artigos, teses e dissertações.
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1. Effects of Different Plasma Nitrided Layers on the Tribological Performance of DLC Coatings
When multifunctional surface engineering processes that combine purpose-oriented phases are applied to soft substrates, a combination of high wear resistance, high load support and low coefficients of friction can be achieved. In this study, the effects of different nitrided layers on the tribological behaviour of a diamond-like carbon (DLC) film deposited o
Mat. Res.. Publicado em: 12/09/2016
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2. Application of design of experiments to plasma Arc Welding Process: a review
Design of Experiment commonly referred to as DOE is one of the extensively used methods for experimental study of many manufacturing processes in engineering. DOE is a statistical approach in which a mathematical model is developed through experimental runs. DOE predicts possible output based on the input parameters of the experimental setup. In the present
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-03
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3. Plasma assisted parts' manufacturing: sintering and surface texturing - part I - influence of sintering time and temperature
The acquirements and potentiality universe of cleaning, heating and/or sputtering effects caused by plasma species bombardment phenomenon on the surface characteristics and finishing of manufactured parts treated in DC abnormal glow discharge opens a new research and development field, called here of Plasma Assisted Parts' Manufacturing (PAP'M). The adequate
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-06
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4. Plasma assisted parts' manufacturing: sintering and surface texturing - part II - influence of inter-cathode distance and gas pressure
The acquirements and potentiality universe of cleaning, heating and/or sputtering effects caused by plasma species bombardment phenomenon on the surface characteristics and finishing of manufactured parts treated in DC abnormal glow discharge opens a new research and development field, called here of Plasma Assisted Parts' Manufacturing (PAP'M). The adequate
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-06
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5. Efeito do carbono no processo de nitrocarburização com plasma pulsado da liga metalica AISI H13 / Carbon effect on pulsed plasma nitrocarburizing process in AISI H13 tool steel
This work presents a study on the effect of the incorporation of carbon and nitrogen on he formation of a singlephase homogeneous layer, composed by e -Fe2-3(C,N) carbonitrides, on the top surface of a AISI H13 tool steel. We also present studies on the effect of the incorporation of these elements (C and N) in the microstructure and in the mechanical and ch
Publicado em: 2007
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6. Modificação das propriedades superficiais de materiais através da implantação de cromo por recoil por meio de implantação iônica por imersão em plasma de nitrogênio / Modification of surface properties of materials by chromium recoil implantation using nitrogen plasma immersion ion implantation
The objective of this work is the modification of the surface properties of conductive materials (carbon steel) and semiconductors (silicon) using the implantation of chromium atoms, deposited on the surface of materials as thin films, using plasma immersion ion implantation. In this study we seek to understand the basic process of recoil implantation (using
Publicado em: 2007
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7. Modification of surface properties of materials by chromium recoil implantation using nitrogen plasma immersion ion implantation / Modificação das propriedades superficiais de materiais através da implantação de cromo por recoil por meio de implantação iônica por imersão em plasma de nitrogênio
Este trabalho tem por objetivo a modificação das propriedades superficiais de materiais condutores (aço carbono) e semicondutores (silício) utilizando a implantação de átomos de cromo, depositados na superfície dos materiais sob a forma de um filme fino, por meio da implantação iônica por imersão a plasma. O estudo visa entender o processo básic
Publicado em: 2007
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8. Propriedades microscopicas e macroscopicas de superficie em ligas ferrosas implantadas com nitrogenio
The understanding of cosmic radiation -the production/ acceleration mechanism and the propagation processes -involves the determination of three parameters: the energy of this radiation, its arrival direction and the chemical composition. These three tasks have challenged the experience, the skill and responsibility of several groups of particle physicists o
Publicado em: 2004
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9. Obtenção de revestimentos dúplex por nitretação a plasma e PVD-TiN em aços ferramenta AISI D2 e AISI H13. / Duplex coatings on AISI H13 and AISI D2 tool steels by using plasma nitriding and TiN-PVD.
In this work, the influence of both the microstructure and the load-bearing capacity of nitrided layers, formed on top of AISI D2 and AISI H13 tool steels, on adhesion and wear resistance of PVD-TiN coatings was studied. The threshold nitriding potential curves for the above mentioned steels and the optimum conditions of the pre-treatments which increased th
Publicado em: 2003
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10. Superficial Nitrogen Enrichment of Austenitic stainless steel ISO 5832-1 / ElevaÃÃo do teor superficial de nitrogÃnio no aÃo inoxidÃvel austenÃtico ISO 5832-1
The insertion of nitrogen in stainless steel has been studied since 1925. When in solid solution it produces a few effects such as: increase in mechanical strength, hardness, resistance to fatigue, to wear and corrosion. Although benefic effects of nitrogen on the proprieties of steel are well known, the introduction of this element in high amounts is not tr
Publicado em: 2001
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11. Imaging of receptor trafficking by using α-bungarotoxin-binding-site-tagged receptors
α-Amino-3-hydroxy-5-methyl-4-isoxazole-propionate (AMPA) receptors mediate excitatory synaptic transmission and are dynamically regulated during synaptic plasticity in the CNS. The membrane trafficking of AMPA receptors to synapses is critical for the regulation of the efficacy of excitatory synaptic transmission. Direct imaging of AMPA receptors in various
National Academy of Sciences.