Microstructure and Nanoindentation Behavior of Ti40Zr40Ni20 Quasicrystal Alloy by Casting and Rapid Solidification

A Ti40Zr40Ni20 quasicrystal (QCs) rod and ribbons were prepared by conventional casting and rapid solidification. The X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimeter (DSC) techniques were used to investigate the microtissue, phase composition, and solidification features of the samples; the nano-indentation test was carried out at room temperature. The results show that a mixture of the α-Ti(Zr) phase and the icosahedral quasicrystal (I-phase) was formed in the Ti40Zr40Ni20 rod; the microstructure of Ti40Zr40Ni20 ribbons mainly consisted of the I-phase. The solidification mechanism of the I-phase was different in the two alloys. The I-phase in the quasicrystalline rod was formed by packet reaction while in the ribbons it was generated directly from the liquid. At room temperature, both samples had relatively high hardness and elastic modulus; the elastic modulus of the ribbons is 76 GPa, higher than the 45 GPa of the rod. The hardness of the ribbons was more than twice that of the rod.

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Synthesis and Photoluminescence Properties of Novel SnO2 Zigzag Nanoribbons

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.4213 ◽

2010 ◽

Vol 97-101 ◽

pp. 4213-4216

Author(s):

Jian Xiong Liu ◽

Zheng Yu Wu ◽

Guo Wen Meng ◽

Zhao Lin Zhan

Keyword(s):

Electron Microscopy ◽

Room Temperature ◽

Vapour Deposition ◽

Chemical Vapour ◽

Photoluminescence Properties ◽

X Ray Diffraction ◽

X Ray ◽

Selected Area Electron Diffraction ◽

Transmission Electron ◽

Ceramic Boat

Novel single-crystalline SnO2 zigzag nanoribbons have been successfully synthesized by chemical vapour deposition. Sn powder in a ceramic boat covered with Si plates was heated at 1100°C in a flowing argon atmosphere to get deposits on a Si wafers. The main part of deposits is SnO2 zigzag nanoribbons. They were characterized by means of X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM) and selected-area electron diffraction (SAED). SEM observations reveal that the SnO2 zigzag nanoribbons are almost uniform, with lengths near to several hundred micrometers and have a good periodically tuned microstructure as the same zigzag angle and growth directions. Possible growth mechanism of these zigzag nanoribbons was discussed. A room temperature PL spectrum of the zigzag nanoribbons shows three peaks at 373nm, 421nm and 477nm.The novel zigzag microstructures will provide a new candidate for potential application.

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A Facile Fynthesis of ZnS Nanostructures via Liquid-Solid Reactions

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.979.184 ◽

2014 ◽

Vol 979 ◽

pp. 184-187

Author(s):

Weerachon Phoohinkong ◽

Thitinat Sukonket ◽

Udomsak Kitthawee

Keyword(s):

Electron Microscopy ◽

Room Temperature ◽

Inorganic Salts ◽

Chloride Salt ◽

X Ray ◽

Commercial Grade ◽

Transmission Electron ◽

Salt Addition ◽

20 Nm ◽

Scanning Electron

Zinc sulfide (ZnS) nanostructures are important materials for many technologies such as sensors, infrared windows, transistors, LED displays, and solar cells. However, many methods of synthesizing ZnS nanostructures are complex and require expensive equipment. In this study, a liquid-solid chemical reaction without surfactant was used to synthesize ZnS at room temperature. In addition, commercial grade zinc oxide (ZnO) particles were used as a precursor. The effect of the addition of acids and inorganic salts were investigated. The products were characterized by field emission scanning electron microscopy (FESEM) coupled with energy-dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM). The results show that the nanoparticles of ZnS were obtained in hydrochloric acid and acetic acid addition. The diameters were in the range of 10 to 20 nm and 50 to 100 nm, respectively. In the case of a sodium chloride salt addition, a ZnS structure was obtained with a particle size of approximately 5 nm and a flake-like morphology.

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New method for the production of bulk amorphous materials of Nd–Fe–B alloys

Journal of Materials Research ◽

10.1557/jmr.2005.0098 ◽

2005 ◽

Vol 20 (3) ◽

pp. 563-566 ◽

Cited By ~ 16

Author(s):

Tetsuji Saito ◽

Hiroyuku Takeishi ◽

Noboru Nakayama

Keyword(s):

Electron Microscopy ◽

Amorphous Materials ◽

Room Temperature ◽

Amorphous Structure ◽

X Ray Diffraction ◽

Bulk Materials ◽

X Ray ◽

Transmission Electron ◽

Melt Spun ◽

Melt Spun Ribbons

We report a new compression shearing method for the production of bulk amorphous materials. In this study, amorphous Nd–Fe–B melt-spun ribbons were successfully consolidated into bulk form at room temperature by the compression shearing method. X-ray diffraction and transmission electron microscopy studies revealed that the amorphous structure was well maintained in the bulk materials. The resultant bulk materials exhibited the same magnetic properties as the original amorphous Nd–Fe–B materials.

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Room Temperature Self-Annealing of Electroplated and Sputtered Copper Films

MRS Proceedings ◽

10.1557/proc-562-249 ◽

1999 ◽

Vol 562 ◽

Cited By ~ 1

Author(s):

Michelle Chen ◽

Suraj Rengarajan ◽

Peter Hey ◽

Yezdi Dordi ◽

Hong Zhang ◽

...

Keyword(s):

Electron Microscopy ◽

Room Temperature ◽

Copper Film ◽

Copper Films ◽

Organic Additives ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Electroplated Copper ◽

Effect Of Copper

ABSTRACTSelf-annealing properties of electroplated and sputtered copper films at room temperature were investigated in this study, in particular, the effect of copper film thickness, electrolyte systems used, as well as their level of organic additives for electroplating. Real-time grain growth was observed by transmission electron microscopy. Sheet resistance and X-ray diffraction measurements further confirmed the recrystallization of the electroplated copper film with time. The recrystallization of electroplated films was then compared with that of sputtered copper films.

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Hyperfine interaction and some thermomagnetic properties of amorphous and partially crystallized Fe70−xMxMo5Cr4Nb6B15 (M = Co or Ni, x = 0 or 10) alloys

Nukleonika ◽

10.1515/nuka-2015-0025 ◽

2015 ◽

Vol 60 (1) ◽

pp. 121-126

Author(s):

Jakub Rzącki ◽

Jan Świerczek ◽

Mariusz Hasiak ◽

Jacek Olszewski ◽

Józef Zbroszczyk ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Hyperfine Interaction ◽

Magnetic Structure ◽

Curie Point ◽

Room Temperature ◽

Ferromagnetic Phase ◽

X Ray ◽

Transmission Electron ◽

Thermomagnetic Properties

Abstract As revealed by Mössbauer spectroscopy, replacement of 10 at.% of iron in the amorphous Fe70Mo5Cr4Nb6B15 alloy by cobalt or nickel has no effect on the magnetic structure in the vicinity of room temperature, although the Curie point moves from 190 K towards ambient one. In the early stages of crystallization, the paramagnetic crystalline Cr12Fe36Mo10 phase appears before α-Fe or α-FeCo are formed, as is confirmed by X-ray diffractometry and transmission electron microscopy. Creation of the crystalline Cr12Fe36Mo10 phase is accompanied by the amorphous ferromagnetic phase formation at the expense of amorphous paramagnetic one.

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A Novel X-Ray Radiation Sensor Based on Networked SnO2 Nanowires

Applied Sciences ◽

10.3390/app9224878 ◽

2019 ◽

Vol 9 (22) ◽

pp. 4878 ◽

Cited By ~ 5

Author(s):

Jae-Hun Kim ◽

Ali Mirzaei ◽

Hyoun Woo Kim ◽

Hong Joo Kim ◽

Phan Quoc Vuong ◽

...

Keyword(s):

Electron Microscopy ◽

Room Temperature ◽

Low Cost ◽

X Rays ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Radiation Sensor ◽

Sno2 Nanowires ◽

Radiation Sensors

X-Ray radiation sensors that work at room temperature are in demand. In this study, a novel, low-cost real-time X-ray radiation sensor based on SnO2 nanowires (NWs) was designed and tested. Networked SnO2 NWs were produced via the vapor–liquid–solid technique. X-ray diffraction (XRD), transmission electron microscopy (TEM) and field emission scanning electron microscopy (SEM) analyses were used to explore the crystallinity and morphology of synthesized SnO2 NWs. The fabricated sensor was exposed to X-rays (80 kV, 0.0–2.00 mA) and the leakage current variations were recorded at room temperature. The SnO2 NWs sensor showed a high and relatively linear response with respect to the X-ray intensity. The X-ray sensing results show the potential of networked SnO2 NWs as novel X-ray sensors.

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Effect of Au on the Performance of Porous Silicon/V2O5 Nanorods Heterojunctions to NO2 Gas

NANO ◽

10.1142/s179329201650079x ◽

2016 ◽

Vol 11 (07) ◽

pp. 1650079 ◽

Cited By ~ 3

Author(s):

Wenjun Yan ◽

Ming Hu ◽

Jiran Liang ◽

Dengfeng Wang ◽

Yulong Wei ◽

...

Keyword(s):

Electron Microscopy ◽

Porous Silicon ◽

Room Temperature ◽

Au Nanoparticles ◽

Analytical Techniques ◽

Heating Process ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Scanning Electron

A novel composite of Au-functionalized porous silicon (PS)/V2O5 nanorods (PS/V2O5:Au) was prepared to detect NO2 gas. PS/V2O5 nanorods were synthesized by a heating process of pure vanadium film on PS, and then the obtained PS/V2O5 nanorods were functionalized with dispersed Au nanoparticles. Various analytical techniques, such as field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), have been employed to investigate the properties of PS/V2O5:Au. Herein, the PS/V2O5:Au sample exhibited improved NO2-sensing performances in response, stability and selectivity at room temperature (25[Formula: see text]C), compared with the pure PS/V2O5 nanorods. These phenomena were closely related to not only the dispersed Au nanoparticles acting as a catalyst but also the p-n heterojunctions between PS and V2O5 nanorods. Whereas, more Au nanoparticles suppressed the improvement of response to NO2 gas.

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Synthesis of Silicon Carbide Nanoparticles from Carbon Nanotubes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.602-604.183 ◽

2012 ◽

Vol 602-604 ◽

pp. 183-186 ◽

Cited By ~ 1

Author(s):

Jing Liu ◽

Rong Wu ◽

Jin Li ◽

Yan Fei Sun ◽

Ji Kang Jian

Keyword(s):

Electron Microscopy ◽

Carbon Nanotubes ◽

Scanning Electron Microscopy ◽

Silicon Carbide ◽

Room Temperature ◽

Sic Nanoparticles ◽

X Ray ◽

Transmission Electron ◽

Cubic Silicon Carbide ◽

Scanning Electron

In this paper, we report the synthesis of cubic silicon carbide (3C-SiC) nanoparticles by direction reaction of silicon powders and carbon nanotubes. The as-prepared SiC nanoparticles were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy and Raman scattering at room temperature. The possible growth mechanism is proposed.

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Room Temperature Self-Annealing of Electroplated and Sputtered Copper Films

MRS Proceedings ◽

10.1557/proc-564-413 ◽

1999 ◽

Vol 564 ◽

Cited By ~ 5

Author(s):

Michelle Chen ◽

Suraj Rengarajan ◽

Peter Hey ◽

Yezdi Dordi ◽

Hong Zhang ◽

...

Keyword(s):

Electron Microscopy ◽

Room Temperature ◽

Copper Film ◽

Copper Films ◽

Organic Additives ◽

X Ray Diffraction ◽

X Ray ◽

Transmission Electron ◽

Electroplated Copper ◽

Effect Of Copper

AbstractSelf-annealing properties of electroplated and sputtered copper films at room temperature were investigated in this study, in particular, the effect of copper film thickness, electrolyte systems used, as well as their level of organic additives for electroplating. Real-time grain growth was observed by transmission electron microscopy. Sheet resistance and X-ray diffraction measurements further confirmed the recrystallization of the electroplated copper film with time. The recrystallization of electroplated films was then compared with that of sputtered copper films.

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Preparation of Hollow Nickel Ferrite Microspheres and their Magnetic Properties

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1035.488 ◽

2014 ◽

Vol 1035 ◽

pp. 488-491

Author(s):

Jing Jing Li ◽

Yun Zhao ◽

Han Sheng Li ◽

Qin Wu ◽

Qing Ze Jiao

Keyword(s):

Electron Microscopy ◽

Scanning Electron Microscopy ◽

Nickel Ferrite ◽

Room Temperature ◽

Solvothermal Method ◽

Magnetization Measurement ◽

Vibrating Sample Magnetometer ◽

X Ray ◽

Transmission Electron ◽

Scanning Electron

Hollow nickel ferrite microspheres with a diameter of about 1.5 to 2.5 μm were synthesized using an emulsion-based solvothermal method in combination with calcination at 550°C. The structures and morphologies of the nickel ferrite microspheres were characterized using an X-ray diffractometer, a transmission electron microscopy and a field emission scanning electron microscopy. Magnetization measurement was carried out using a vibrating sample magnetometer at room temperature. The saturation magnetization and coercivity of nickel ferrite microspheres could reach 19.41 emu/g and 202.28 Oe, respectively. Hollow nickel ferrite microspheres might be used as catalysts, magnetic materials and microwave absorbers.

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