A. C. Impedance Analysis on b-axis Oriented Ba1-xSrxTi2O5 Prepared by an Arc-Melting Method

In this study, the W-Si-C multi-phase composites were fabricated by an arc melting method. With addition of SiC, the grain size of W is obviously reduced, and the small angle misorientation becomes dominate, which is beneficial for the improvement of deformability. The effects of SiC additions (from 0.5 to 3wt%) on the microstructure and mechanical properties are mainly investigated. With 1 wt% SiC addition, the flexural strength reaches the highest value. The self-generation of W5Si3 may enhance the strength and ductility, but too much W5Si3 exists as brittle BP (Brittle to Plastic) microstructure. The highest flexural strength is obtained at approximately 1 vol% W5Si3.

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Synthesis, Microstructure and Crystal Structure of Perovskite-Type CeMO3 (M=Al, Ga) by Arc-Melting Method with Horizontal-Traveling Hearth

Journal of the Ceramic Society of Japan ◽

10.2109/jcersj.106.509 ◽

1998 ◽

Vol 106 (1233) ◽

pp. 509-513 ◽

Cited By ~ 2

Author(s):

Toetsu SHISHIDO ◽

Yutong THENG ◽

Akihiro SAITO ◽

Hiroyuki HOIUCHI ◽

Toshitsugu TAKAHASHI ◽

...

Keyword(s):

Crystal Structure ◽

Melting Method ◽

Arc Melting ◽

Perovskite Type

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Study on Homogenization Time and Cooling Rate on Microstructure and Hardness of Ni-42.5wt%Ti-3wt%Cu Alloy

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.297-301.489 ◽

2010 ◽

Vol 297-301 ◽

pp. 489-494 ◽

Cited By ~ 3

Author(s):

A. Etaati ◽

Ali Shokuhfar ◽

E. Omrani ◽

P. Movahed ◽

H. Bolvardi ◽

...

Keyword(s):

Cooling Rate ◽

Hardness Test ◽

Vacuum Arc ◽

Melting Method ◽

X Ray ◽

Cu Alloy ◽

Arc Melting ◽

Vacuum Arc Melting ◽

Homogenization Time ◽

Cooling Media

Over the last decades, numerous investigations have been conducted on Nitinol properties. However, the effects of alloying elements on Ni-rich NiTi alloys have been considered less. In this research, different effects of homogenization time and cooling rate on the behaviors of Ni-42.5wt%Ti-3wt%Cu alloy were evaluated. The mentioned alloy was fabricated by vacuum arc melting method. Three different homogenization times (half, one and two hours) and three cooling media (water, air and furnace) were selected. The microstructure and hardness were examined by means of optical and scanning electron microscope (SEM) equipped with an energy dispersive X-ray (EDX) analysis and hardness test, respectively. According to the microscopic investigations, no significant changes were observed after half an hour. However, results indicate that increasing time of homogenization leads to finer precipitations and a uniform distribution of them. The various cooling environments result in the formation of two types of precipitation phases. It was seen that in the high cooling rate, the majority of precipitations consisted of Ti2(Ni,Cu) while by decreasing cooling rate NiTiCu precipitates appeared too, which affect the hardness.

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Crystal structure and Mössbauer study of FeAl2O4

Nukleonika ◽

10.1515/nuka-2015-0012 ◽

2015 ◽

Vol 60 (1) ◽

pp. 47-49 ◽

Cited By ~ 21

Author(s):

Ilona Jastrzębska ◽

Jacek Szczerba ◽

Paweł Stoch ◽

Artur Błachowski ◽

Krzysztof Ruebenbauer ◽

...

Keyword(s):

Crystal Structure ◽

Spinel Structure ◽

Approximate Formula ◽

Argon Atmosphere ◽

Mossbauer Effect ◽

Mössbauer Study ◽

Melting Method ◽

X Ray ◽

Octahedral Sites ◽

Arc Melting

Abstract In this work the synthesis of hercynite from Fe2O3 and Al2O3 powders was carried out by arc-melting method under the protective argon atmosphere. The obtained material was characterized with the use of powder X-ray diffractometry (XRD) and Mössbauer spectroscopy (MS). A Mössbauer effect in hercynite obtained by the arc-melting method indicated the cations distribution in the spinel structure among the tetrahedral and octahedral interstices. The presence of Fe2+ ions was detected in both tetrahedral and octahedral sites while Fe3+ ions occupied only the octahedral interstices. The approximate formula of the obtained iron-aluminate spinel was as follows (Fe2+0.77Al3+0.23) (Fe3+0.07Fe2+0.05Al0.88)2O4.

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Development of Textured Ni Substrates for Coated Conductor Prepared by Powder Metallurgy and Plasma Arc Melting Method

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2004.830415 ◽

2004 ◽

Vol 14 (2) ◽

pp. 1086-1089 ◽

Cited By ~ 5

Author(s):

J.H. Lim ◽

K.T. Kim ◽

J.H. Kim ◽

S.H. Jang ◽

J. Joo ◽

...

Keyword(s):

Powder Metallurgy ◽

Coated Conductor ◽

Plasma Arc ◽

Melting Method ◽

Arc Melting

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Direct Production of Pure Molybdenum Metal from Molybdenite Concentration (MoS2) by using a Plasma-Arc Melting Method.

Shigen-to-Sozai ◽

10.2473/shigentosozai.108.111 ◽

1992 ◽

Vol 108 (2) ◽

pp. 111-116

Author(s):

Kouji MIMURA ◽

Michio NANJO

Keyword(s):

Plasma Arc ◽

Direct Production ◽

Melting Method ◽

Molybdenum Metal ◽

Pure Molybdenum ◽

Arc Melting

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X-Ray Stress Measurement of Ni-Ai System Intermetallic Compounds

Advances in X-ray Analysis ◽

10.1154/s0376030800022643 ◽

1995 ◽

Vol 39 ◽

pp. 243-249

Author(s):

Tokimasa Goto ◽

Hiroyuki Tabata ◽

Yukio Hirose

Keyword(s):

Intermetallic Compounds ◽

Stress Measurement ◽

Preferred Orientation ◽

Coarse Grain ◽

X Rays ◽

Melting Method ◽

X Ray ◽

Arc Melting ◽

Coarse Grains ◽

Heat Resisting Materials

The microstructures and mechanical properties of Ni-Al system intermetallic compounds used as heat resisting materials have been investigated by many researchers[l,2], but there are few studies applying X-ray stress measurement to these materials[3]. Two problems make it difficult: One is the comparatively coarse grain size, the other is the strong preferred orientation along the direction of the solidification. Therefore, it become possible to evaluate mechanical behavior in these materials, if we can measure the residual stresses correctlv by X-rays.In this paper, Ni-25mol%AI(Ni3Al) made by the arc-melting method was employed. It consists of comparatively coarse grains and has strong preferred orientation along the direction of the solidification.

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XRD STUDY OF THE Er1-xDyxNi2B2C SYSTEM MAGNETIC SUPERCONDUCTORS

International Journal of Modern Physics B ◽

10.1142/s0217979205032516 ◽

2005 ◽

Vol 19 (26) ◽

pp. 3945-3950

Author(s):

XIAOLING QIN ◽

SHIXUN CAO ◽

LIMING YU ◽

JINCANG ZHANG ◽

KATSUHIKO NISHIMURA ◽

...

Keyword(s):

Crystal Structure ◽

Ionic Radius ◽

Magnetic Moments ◽

Powder Xrd ◽

Melting Method ◽

Arc Melting ◽

Xrd Study ◽

Superconducting Compound ◽

Change Of Microstructure ◽

Ionic Radius Difference

The magnetic superconducting samples of the intermetallic Er 1-x Dy x Ni 2 B 2 C system are prepared by the arc melting method. Powder XRD measurements are systematically conducted and analyzed. The change of microstructure reflects the contribution of the different magnetic moments and the ionic radius difference of Er and Dy to the crystal structure in the substitution of Er 1-x Dy x Ni 2 B 2 C system. The element substitution of Dy for Er in the magnetic superconducting compound is verified commendably in microstructure level by the powder XRD experiment.

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