21 Result(s)

Article

What Xe Nanocrystals in Al Can Teach us in Materials Science

Noble gases are generally very insoluble in solids. For example, Xe implanted into Al at 300 K forms a fine dispersion of crystalline precipitates and, at large enough fluence, fluid precipitates, both of whic...

C. W. Allen, R. C. Birtcher, U. Dahmen, K. Furuya… in MRS Online Proceedings Library (2011)

Article

Electron-diffraction study on ∈-iron nitride powders with various nitrogen contents: Variation of long-range nitrogen ordering

Homogeneous ∈-iron nitride powder particles of the compositions Fe₃N_1.00, Fe₃N_1.22, Fe₃N_1.30, and Fe₃N_1.39 were investigated using selected-area electron diffraction. The superstructure reflections, due to N orde...

Z. Q. Liu, A. Leineweber, E. J. Mittemeijer, K. Mitsuishi… in Journal of Materials Research (2006)

Article

Fabrication of nanostructures with different iron concentration by electron beam induced deposition with a mixture gas of iron carbonyl and ferrocene, and their magnetic properties

Electron beam induced deposition (EBID) with a mixture gas of iron carbonyl and ferrocene was carried out to fabricate nanostructures with different iron concentrations in a chamber of a scanning electron micr...

M. Takeguchi, M. Shimojo, K. Mitsuishi, M. Tanaka, R. Che… in Journal of Materials Science (2006)

Article

Fabrication of a nano-magnet on a piezo-driven tip in a TEM sample holder

A nanometer-sized magnet (nano-magnet) was fabricated on the tip of a tungsten needle by electron-beam-induced deposition with Fe(CO)₅ gas. The needle tip, which can be moved with a step** motor and piezo-drive...

M. Takeguchi, M. Shimojo, R. Che, K. Furuya in Journal of Materials Science (2006)

Article

Electron beam-induced formation of nanosized α-Fe crystals

Focused electron beam induced chemical vapor deposition was performed in a scanning electron microscope with a field emission gun using a precursor of iron carbonyl. Due to the longer deposition time and highe...

W. Zhang, M. Shimojo, M. Takeguchi, K. Furuya in Journal of Materials Science (2006)

Article

Transmission electron microscopy study on the superstructure and the precipitation of γ′-Fe₄N in initially homogeneous ɛ-iron nitride powders

Annealed and quenched ɛ-Fe_2-3N powders with an initially homogeneous composition of Fe₃N_1.0 were studied by transmission electron microscopy (TEM). TEM specimens were successfully prepared from the powder using a...

Z. Q. Liu, A. Leineweber, K. Mitsuishi, K. Furuya in Journal of Materials Science (2006)

Article

Formation of iron silicide nano-islands on Si substrates by metal organic chemical vapor deposition under electron beams

Electron-beam induced chemical vapor deposition (EBI-CVD) of Fe(CO)₅ was performed on both Si (111) and (110) substrates at 673–873 K inside an ultrahigh vacuum transmission electron microscope. The formation of ...

M. Tanaka, F. Chu, M. Shimojo, M. Takeguchi, K. Mitsuishi… in Journal of Materials Science (2006)

Article

TEM study of Mg-Zn precipitates in Mg-Zn-Y alloys

The precipitates in Mg-Zn-Y alloys in the as-cast state with nominal atomic composition of Mg₉₆Zn₁Y₃, Mg₉₆Zn₂Y₂ and Mg₉₇Zn₁Y₂ were studied by means of TEM as well as XRD techniques. The results show that there is...

J. C. Rao, M. Song, K. Furuya, S. Yoshimoto, M. Yamasaki… in Journal of Materials Science (2006)

Article

Transmission electron microscopy investigation on the electron-stimulated oxidation of iron nitrides by 2-MeV electron irradiation

An iron nitride sample was irradiated by 2-MeV electrons intermittently for 2100 s with a dose rate of 6.3 × 10²⁴ e.m.⁻² s⁻¹ inside a 3-MV high-voltage transmission electron microscope. The electron-stimulated ox...

Z. Q. Liu, H. Hashimoto, T. Sakata, H. Mori, M. Song… in Journal of Materials Research (2005)

Article

In situ transmission electron microscopy investigation of radiation effects

In situ observation is of great value in the study of radiation damage utilizing electron or ion irradiation. We summarize the facilities and give examples of work found around the world. In situ observations ...

R. C. Birtcher, M. A. Kirk, K. Furuya, G. R. Lumpkin… in Journal of Materials Research (2005)

Chapter and Conference Paper

Electron beam induced deposition of position and size controlled structures on the nanometre scale

Electron beam induced deposition (EBID) was carried out with gas introduction systems attached to field emission scanning and transmission electron microscopes (FE-SEM and FE-TEM). Using tungsten and iron carb...

K Furuya, K Mitsuishi, M Shimojo, M Song… in Microscopy of Semiconducting Materials (2005)

Article

Transmission Electron Microscopy and High-Resolution Transmission Electron Microscopy Study of Nanostructure and Metastable Phase Evolution in Pulsed-Laser-Ablation–Deposited Ti–Si Thin Film

Thin films with a nominal composition close to Ti_62.5Si_37.5 were deposited on NaCl substrate at room temperature by pulsed laser ablation to study the evolution of the intermetallic compound Ti₅Si₃ using a combin...

S. Bysakh, K. Mitsuishi, M. Song, K. Furuya… in Journal of Materials Research (2004)

Article

Selective growth of colored and colorless β-Si₃N₄ single crystals

J. Ye, N. Kojima, I. Ishikawa, K. Furuya, K. Matsuo… in Journal of Materials Science Letters (2002)

Article

Microstructural Changes to Xenon Naonoclusters in Aluminum under 1 MeV Electron Irradiation

Aluminum films containing solid Xe precipitates have been subjected to 1 MeV electron irradiation in a high-voltage electron microscope. High-resolution images have been recorded on videotape in order to monit...

S. E. Donnelly, R. C. Birtcher, C. W. Allen, K. Furuya… in MRS Online Proceedings Library (2001)

Article

Si3N4-whisker/Si growth interface study using EPMA chemical shift map** of Si-Kβ bands

J. Ye, T. Okamura, I. Ishikawa, K. Furuya… in Journal of Materials Science Letters (1999)

Article

Synthesis of large-size β–Si₃N₄ crystals

Large-sized β–Si₃N₄ crystals up to 10 mm in length and 0.3 mm in diameter with low impurity concentration are successfully grown from silicon melt in a nitrogen atmosphere. By controlling the concentration of imp...

K. Furuya, K. Matsuo, F. Munakata, Y. Akimune, J. Ye… in Journal of Materials Research (1999)

Chapter

Electron-Wave Diffraction Devices

By analogy with optics, for example, Fourier transforms can be performed by the electron wave. Important for the realization of such devices is the spread of the electron wavefront, which is the subject of thi...

K. Furuya in Mesoscopic Physics and Electronics (1998)

Chapter

Introduction

The long history of the field of electronics shows that it takes more than a decade to mature a new technology after planting its seed. LSI technology is growing steadily at present but the growth cannot last ...

K. Furuya in Mesoscopic Physics and Electronics (1998)

Article

In-situ observation of atomic processes in Xe nanocrystals embedded in al

Self-organization processes in Xe nanocrystals embedded in Al are observed with in-situ high-resolution electron microscopy. Under electron irradiation, stacking fault type defects are produced in Xe nanocryst...

K. Mitsuishi, M. Song, K. Furuya, R. C. Birtcher… in MRS Online Proceedings Library (1997)

Article

NdBCO melting and solidification by a zone-melting method

In the Nd-Ba-Cu-O system, a directional structure produced by a peritectic reaction has been observed. On heating, the sintered Nd₁Ba₂Cu₃O_6+δ (Ndl23) precursor formed a rod-like directional structure of Nd₄Ba₂Cu₂

X. Yao, K. Furuya, Y. Nakamura, J. Wen, A. Endoh… in Journal of Materials Research (1995)