Synthesis of nanosize powders of aluminum nitride by pulsed wire discharge

2002 ◽  
Author(s):  
Y. Kinemuchi ◽  
C. Sangurai ◽  
T. Suzuki ◽  
H. Suematsu ◽  
W. Jiang ◽  
...  
Keyword(s):  
Aluminum Nitride ◽  
Pulsed Wire Discharge

Nanosize Powders of Aluminum Nitride Synthesized by Pulsed Wire Discharge

2003 ◽  
Vol 86 (3) ◽  
pp. 420-424 ◽  
Author(s):  
Yoshiaki Kinemuchi ◽  
Keiichi Murai ◽  
Channalong Sangurai ◽  
Chu-Hyun Cho ◽  
Hisayuki Suematsu ◽  
...  
Keyword(s):  
Aluminum Nitride ◽  
Pulsed Wire Discharge

Nano-Particulate of Aluminum Nitride Prepared by Pulsed Wire Discharge

2001 ◽  
Vol 704 ◽  
Author(s):  
Yoshiaki Kinemuchi ◽  
Channarong Sangurai ◽  
Tsuneo Suzuki ◽  
Hisayuki Suematsu ◽  
Weihua Jiang ◽  
...  
Keyword(s):  
Aluminum Nitride ◽  
Particle Distribution ◽  
Geometric Standard Deviation ◽  
Half Cycle ◽  
Aluminum Wire ◽  
Dry Process ◽  
Pulsed Wire Discharge ◽  
Average Size ◽  
Charging Energy ◽  
Maximum Content

AbstractNanoparticulates of aluminum nitride (AlN) have been synthesized by novel dry process, namely pulsed wire discharge where aluminum wire is exploded by an intense pulsed current (10-20 kA at the peak, half cycle of 10 μs) in NH3/N2 gas. The average size of the nanoparticulates was found to be 28 nm. Furthermore, narrow particle distribution of the particulates was observed, where geometric standard deviation was 1.29. Increasing charging energy enhances the nitridation of aluminum. The maximum content of AlN in synthesized particulates was ∼95 %. The sintered body with 80 % of density has been obtained by sintering at 1, 600°C for one hour.

Synthesis of Aluminum Nitride Nanopowder with Particle Size Less than 10 nm by Pulsed Wire Discharge in Nitrogen Gas

2010 ◽  
Vol 49 (11) ◽  
pp. 116201 ◽  
Author(s):  
Yoshinori Tokoi ◽  
Tsuneo Suzuki ◽  
Tadachika Nakayama ◽  
Hisayuki Suematsu ◽  
Futao Kaneko ◽  
...  
Keyword(s):  
Particle Size ◽  
Aluminum Nitride ◽  
Nitrogen Gas ◽  
Pulsed Wire Discharge

Purification of Aluminum Nitride Nanosize Powder Synthesized by Pulsed Wire Discharge

2013 ◽  
pp. 61-68
Author(s):  
C. Cho ◽  
Y. Kinemuchi ◽  
T. Suzuki ◽  
H. Suematsu ◽  
W. Jiang ◽  
...  
Keyword(s):  
Aluminum Nitride ◽  
Pulsed Wire Discharge ◽  
Nanosize Powder

Synthesis of Aluminum Nitride Nanosized Powder by Pulsed Wire Discharge without Ammonia

2010 ◽  
pp. 143-153
Author(s):  
Yoshinori Tokoi ◽  
Tsuneo Suzuki ◽  
Tadachika Nakayama ◽  
Hisayuki Suematsu ◽  
Futao Kaneko ◽  
...  
Keyword(s):  
Aluminum Nitride ◽  
Nanosized Powder ◽  
Pulsed Wire Discharge

Enhancement of Nitridation in Synthesis of Aluminum Nitride Nanosize Powders by Pulsed Wire Discharge

2003 ◽  
Vol 42 (Part 1, No. 4A) ◽  
pp. 1763-1765 ◽  
Author(s):  
Chuhyun Cho ◽  
Yoshiaki Kinemuchi ◽  
Hisayuki Suematsu ◽  
Weihua Jiang ◽  
Kiyoshi Yatsui
Keyword(s):  
Aluminum Nitride ◽  
Pulsed Wire Discharge

Synthesis of Nanosize Powders of Aluminum Nitride by Pulsed Wire Discharge

2001 ◽  
Vol 40 (Part 1, No. 2B) ◽  
pp. 1070-1072 ◽  
Author(s):  
Channarong Sangurai ◽  
Yoshiaki Kinemuchi ◽  
Tsuneo Suzuki ◽  
Weihua Jiang ◽  
Kiyoshi Yatsui
Keyword(s):  
Aluminum Nitride ◽  
Pulsed Wire Discharge

Construction of plastic contact deformation maps on ceramics: a case study on aluminum nitride

1996 ◽  
Vol 54 ◽  
pp. 636-637
Author(s):  
D. L. Callahan
Keyword(s):  
Plastic Deformation ◽  
Aluminum Nitride ◽  
Mechanical Response ◽  
Three Dimensional ◽  
Bright Field Image ◽  
Perfectly Plastic ◽  
Contrast Analysis ◽  
Deformation Patterns

Modern polishing, precision machining and microindentation techniques allow the processing and mechanical characterization of ceramics at nanometric scales and within entirely plastic deformation regimes. The mechanical response of most ceramics to such highly constrained contact is not predictable from macroscopic properties and the microstructural deformation patterns have proven difficult to characterize by the application of any individual technique. In this study, TEM techniques of contrast analysis and CBED are combined with stereographic analysis to construct a three-dimensional microstructure deformation map of the surface of a perfectly plastic microindentation on macroscopically brittle aluminum nitride.The bright field image in Figure 1 shows a lg Vickers microindentation contained within a single AlN grain far from any boundaries. High densities of dislocations are evident, particularly near facet edges but are not individually resolvable. The prominent bend contours also indicate the severity of plastic deformation. Figure 2 is a selected area diffraction pattern covering the entire indentation area.

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