Casimir pressure in peptide films on metallic substrates: Change of sign via graphene coating

Plasma spraying is a technique which is used to apply coatings to metallic substrates for a variety of purposes, including hardfacing, corrosion resistance and thermal barrier applications. Almost all of the applications of this somewhat esoteric fabrication technique involve materials in hostile environments and the integrity of the coatings is of paramount importance: the effects of process variables on such properties as adhesive strength, cohesive strength and hardness of the substrate/coating system, however, are poorly understood.Briefly, the plasma spraying process involves forming a hot plasma jet with a maximum flame temperature of approximately 20,000K and a gas velocity of about 40m/s. Into this jet the coating material is injected, in powder form, so it is heated and projected at the substrate surface. Relatively thick metallic or ceramic coatings may be speedily built up using this technique.

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Shear Strength and Dsc Analysis of High-Temperature Solders

Archives of Metallurgy and Materials ◽

10.2478/amm-2013-0031 ◽

2013 ◽

Vol 58 (2) ◽

pp. 529-533 ◽

Cited By ~ 5

Author(s):

R. Koleňák ◽

M. Martinkovič ◽

M. Koleňáková

Keyword(s):

Shear Strength ◽

High Temperature ◽

Lead Free ◽

Dsc Analysis ◽

Ultrasonic Activation ◽

Metallic Substrates ◽

Cu Substrate ◽

Lead Free Solders

The work is devoted to the study of shear strength of soldered joints fabricated by use of high-temperature solders of types Bi-11Ag, Au-20Sn, Sn-5Sb, Zn-4Al, Pb-5Sn, and Pb-10Sn. The shear strength was determined on metallic substrates made of Cu, Ni, and Ag. The strength of joints fabricated by use of flux and that of joints fabricated by use of ultrasonic activation without flux was compared. The obtained results have shown that in case of soldering by use of ultrasound (UT), higher shear strength of soldered joints was achieved with most solders. The highest shear strength by use of UT was achieved with an Au-20Sn joint fabricated on copper, namely up to 195 MPa. The lowest average values were achieved with Pb-based solders (Pb-5Sn and Pb-10Sn). The shear strength values of these solders used on Cu substrate varied from 24 to 27 MPa. DSC analysis was performed to determine the melting interval of lead-free solders.

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Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates. Rating of test specimens and manufactured articles subjected to corrosion tests

10.3403/02219291 ◽

2001 ◽

Cited By ~ 1

Keyword(s):

Corrosion Testing ◽

Metallic Substrates ◽

Corrosion Tests ◽

Inorganic Coatings

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Understanding the Effects of Graphene Coating on the Electrostatic Field at the Tip of an Atom Probe Tomography Specimen

Microscopy and Microanalysis ◽

10.1017/s1431927621012356 ◽

2021 ◽

pp. 1-12

Author(s):

Florant Exertier ◽

Jiangting Wang ◽

Jing Fu ◽

Ross K.W. Marceau

Keyword(s):

Electrostatic Field ◽

Atom Probe Tomography ◽

Atom Probe ◽

Graphene Coating

Abstract

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Ultrafast and Durable Li/Na storage by an Iron Selenide Anode Using an Elastic Hierarchical Structure

Inorganic Chemistry Frontiers ◽

10.1039/d1qi00413a ◽

2021 ◽

Author(s):

Peng Jing ◽

Qiong Wang ◽

Chunxiang Xian ◽

Liyu Du ◽

Yin Zhang ◽

...

Keyword(s):

Hierarchical Structure ◽

Carbon Matrix ◽

Iron Selenide ◽

Hierarchical Framework ◽

Unique Structure ◽

Graphene Coating ◽

Elastic Characteristics

FeSe nanoparticles were encapsulated into polycystic carbon matrix (FeSe/C) followed by graphene coating (GF@FeSe/C) via a facile strategy, constructing a hierarchical framework with porous and elastic characteristics. This unique structure...

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A critical look at the prediction of the temperature field around a laser-induced melt pool on metallic substrates

Scientific Reports ◽

10.1038/s41598-021-91039-z ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Yi Shu ◽

Daniel Galles ◽

Ottman A. Tertuliano ◽

Brandon A. McWilliams ◽

Nancy Yang ◽

...

Keyword(s):

Laser Beam ◽

Constant Velocity ◽

Three Dimensional ◽

Laser Beams ◽

Poor Control ◽

Metallic Substrates ◽

Melt Pool ◽

Mechanical Models ◽

Transport Effects ◽

Thermal Histories

AbstractThe study of microstructure evolution in additive manufacturing of metals would be aided by knowing the thermal history. Since temperature measurements beneath the surface are difficult, estimates are obtained from computational thermo-mechanical models calibrated against traces left in the sample revealed after etching, such as the trace of the melt pool boundary. Here we examine the question of how reliable thermal histories computed from a model that reproduces the melt pool trace are. To this end, we perform experiments in which one of two different laser beams moves with constant velocity and power over a substrate of 17-4PH SS or Ti-6Al-4V, with low enough power to avoid generating a keyhole. We find that thermal histories appear to be reliably computed provided that (a) the power density distribution of the laser beam over the substrate is well characterized, and (b) convective heat transport effects are accounted for. Poor control of the laser beam leads to potentially multiple three-dimensional melt pool shapes compatible with the melt pool trace, and therefore to multiple potential thermal histories. Ignoring convective effects leads to results that are inconsistent with experiments, even for the mild melt pools here.

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Defective Graphene Coating-Induced Exposed Interfaces on CoS Nanosheets for High Redox Electrocatalysis in Lithium-Sulfur Batteries

Energy Storage Materials ◽

10.1016/j.ensm.2021.05.031 ◽

2021 ◽

Author(s):

Jiao Guo ◽

Helong Jiang ◽

Xiangcun Li ◽

Zhong Chu ◽

Wenji Zheng ◽

...

Keyword(s):

Graphene Coating ◽

Lithium Sulfur Batteries ◽

Defective Graphene ◽

Lithium Sulfur

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The Influence of Palladium Addition on the Texture Transition in Silver

Materials Science Forum ◽

10.4028/www.scientific.net/msf.495-497.1461 ◽

2005 ◽

Vol 495-497 ◽

pp. 1461-1466

Author(s):

Kazuyoshi Sekine ◽

Zheng Rong Zhang

Keyword(s):

Recrystallization Texture ◽

Room Temperature ◽

Stable State ◽

Rolling Texture ◽

Transition Process ◽

Superconducting Tapes ◽

Alloying Element ◽

Metallic Substrates ◽

Pd Alloy ◽

Texture Transition

Texture transition in silver introduced by the addition of 10 at% Pd alloying element was analyzed in this study. Experimental results show that the dependence of rolling texture on rolling reduction in thickness rather than on rolling temperature has been mostly detected, and the recrystallization texture transition process in pure silver is so strongly influenced by the addition of alloying element palladium that the final stable state of recrystallization texture has been changed from Brass {011}<211> orientation to Copper {112}<111> orientation. The single cube {001}<100> recrystallization texture in warm rolled silver, Brass {011}<211> recrystallization texture in room-temperature rolled silver, and Copper {112}<111> recrystallization texture in room-temperature rolled or warm rolled Ag-10 at% Pd alloy have been successfully developed for the fabrication of metallic substrates suitable for high-temperature superconducting tapes.

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