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Influence of in-situ and ex-situ precipitations on microstructure and mechanical properties of additive manufacturing CoCrFeMnNi high-entropy alloys

期刊: VACUUM, 2021; 187 ()

CoCrFeMnNi high entropy alloys (HEAs) based composites have been synthesized by laser melting deposition (LMD). Through TiC and WC particle additions,......

Stripping GaN/InGaN epitaxial films and fabricating vertical GaN-based light-emitting diodes

期刊: VACUUM, 2021; 187 ()

The growth technology of GaN-based light-emitting-diodes (LEDs) greatly restricts their preparation of vertical structure. Now we can get GaN-based LE......

Effectively enhanced strength by interfacial reactions in in-situ carbon reinforced Al matrix composites

期刊: VACUUM, 2021; 188 ()

This work presented an in-situ method to synthesize carbon on commercial micro-Al powders. The modified Al powders were obtained in a furnace in a sim......

Phase evolution and wear resistance of in-situ synthesized (Cr, W)(23)C-6-WC composite ceramics reinforced Fe-based composite coatings produced by laser cladding

期刊: VACUUM, 2021; 190 ()

In this paper, the composite ceramics reinforced Fe-based composite coating was fabricated by laser cladding Fe60+(0-30 wt%)WC mixed powders. The effe......

Porous manganese dioxide nanosheets on modified graphite felt for cathodes in high-capacity flexible Zinc-MnO2 batteries

期刊: VACUUM, 2021; 191 ()

Modified graphite felt (MGF) is a flexible substrate with many advantages and a simple one-step method involving HNO3 is designed to activate graphite......

Microstructure transformation and high temperature oxidation properties of (FeCoNi)(100-x)Alx new-type high-entropy alloys

期刊: VACUUM, 2021; 191 ()

Oxidation properties of (FeCoNi)100-xAlx (x = 0, 5, 10, 15, and 20) high entropy alloys were investigated in air atmosphere at 800 degrees C. Combined......

Study on the influence of thin plasma thickness on electromagnetic wave attenuation

期刊: VACUUM, 2021; 191 ()

Plasma stealth technology has the advantage of real-time regulation of the absorbing band and does not affect the aerodynamic performance. The thin-la......

Effect of vacuum on the morphology evolution of LiMn0.2Fe0.8PO4 during synthesis and carbon coating process

期刊: VACUUM, 2021; 192 ()

The effect of the vacuum atmosphere in the synthesis and carbon coating process of LiMn0.2Fe0.8PO4/C is analyzed based on the changes in the morpholog......

Optoelectronic artificial synapses based on beta-Ga2O3 films by RF magnetron sputtering

期刊: VACUUM, 2021; 192 ()

Optoelectronic neuromorphic architectures have promising potentials for energy-efficient computing of big data, which are urgently needed to satisfy t......

Epitaxy N-polar GaN on vicinal Sapphire substrate by MOCVD

期刊: VACUUM, 2021; 189 ()

A 1-mu m thick N-polar gallium nitride (GaN) thin film has been grown on 2-inch vicinal sapphire substrate (c off 2 degrees toward m plane) by metal o......

The formation mechanism of (001) preferred orientation for anatase TiO2 film prepared by DC pulsed magnetron sputtering

期刊: VACUUM, 2021; 190 ()

TiO2 films were deposited by DC pulsed magnetron sputtering with different sputtering power density (SPD). Then, as-deposited TiO2 films were annealed......

Development of an ultra-high vacuum system for a cold atom physics rack in space

期刊: VACUUM, 2021; 190 ()

We present the design and testing of the ultra-high vacuum (UHV) system, which is a key apparatus for the Cold Atom Physics Rack (CAPR) operated on th......

Study of multi-cusped plasma thruster applied to Air-Breathing Electric Propulsion

期刊: VACUUM, 2021; 190 ()

Atmosphere-Breathing Electric Propulsion (ABEP) is a unique propulsion concept, it uses atmosphere molecules as propellant and becomes a promising tec......

Evaporation for element Al in K417 Ni-based superalloy during electron beam remelting

期刊: VACUUM, 2021; 187 ()

To date, few researches describe the evaporation for Al well in superalloy during electron beam (EB) melting, for the reason that Al has a very high s......

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