A fabrication method for vertical oxide nano-rod array by internal oxidation of alloys at high-temperatures

2012 ◽  
Vol 12 ◽  
pp. S184-S187 ◽  
Author(s):  
Makoto Nanko ◽  
Dung Thi Mai Do ◽  
Takeshi Ishizaki
Keyword(s):  
High Temperatures ◽  
Internal Oxidation ◽  
Fabrication Method ◽  
Rod Array

Internal Oxidation Depth Penetration in Ni-Based Alloys at High Temperatures

CORROSION ◽  
10.5006/2964 ◽  
2018 ◽  
Vol 75 (2) ◽  
pp. 192-202
Author(s):  
Tomasz Dudziak ◽  
Magdalena Ziąbka
Keyword(s):  
High Temperatures ◽  
Internal Oxidation ◽  
Oxidation Depth

Internal Oxidation Prediction by Cellular Automata Approach in Energy Materials at High Temperatures

2019 ◽  
Vol 21 (7) ◽  
pp. 1801142
Author(s):  
Tomasz Pawel Dudziak ◽  
Katrin Jahns ◽  
Dorota Wilk Kołodziejczyk ◽  
Ulrich Krupp ◽  
Adelajda Polkowska ◽  
...  
Keyword(s):  
Cellular Automata ◽  
High Temperatures ◽  
Internal Oxidation ◽  
Energy Materials

Fabrication of Nanorod Array Structure by Using Aluminizing and Internal Oxidation of Ni with Micro-Channels

2013 ◽  
Vol 761 ◽  
pp. 131-134
Author(s):  
Takeshi Ishizaki ◽  
Dung Thi Mai Do ◽  
Makoto Nanko
Keyword(s):  
Internal Oxidation ◽  
Nanorod Array ◽  
Pack Cementation ◽  
Micro Channel ◽  
Electric Discharge Machining ◽  
Micro Channels ◽  
Channel Surface ◽  
Nano Rods ◽  
Array Structure ◽  
Rod Array

A metallurgical method for preparing oxide nano-rod array structure was developed with internal oxidation of Ni(Al) solid solution obtained by aluminizing Ni with a pack cementation technique. The present method was applied in order to fabricate nano-rod array on the micro-channel surface of microreactor. A micro-channel with 1 mm in depth, 1mm in width and 10 mm in length was fabricated on the Ni disk by an electric discharge machining and electropolishing. The Ni disk with a micro-channel was annealed at 1300°C for 12 h in vacuum. The sample was aluminized by a pack cementation using pack powder mixture consisting of 10 mass% of Ni3Al, 88 mass% of Al2O3 and 2 mass% of NaCl at 1100°C for 12 h in a flow of argon gas. The sample was oxidized from 1000 to 1200°C for 6 h with the Co/CoO buffer. Ni matrix in internally oxidized zone was removed by electropolishing to expose nano-rods. Al2O3 nano-rod array located on the micro-channel surface was successfully fabricated with the proposed technique. Diameter and height of nano-rods were ranged from 100 to 300 nm and from 1.5 to 3 µm, respectively.

Fabrication of Oxide Nano-Rod Array Structures via Internal Oxidation of Alloys

2011 ◽  
Vol 696 ◽  
pp. 348-353
Author(s):  
Makoto Nanko
Keyword(s):  
Internal Oxidation ◽  
Solid Solutions ◽  
Metallic Matrix ◽  
Pack Cementation ◽  
Low Oxygen ◽  
Surface Layers ◽  
Partial Pressures ◽  
Array Structures ◽  
Near Net Shape ◽  
Rod Array

A simple metallurgical process for fabricating oxide nano-rod array structures via internal oxidation is described. Some dilute alloys such as Ni(Al) and Fe(Al) solid solutions develop rod-like oxide precipitates after their internal oxidation at high-temperatures and under low oxygen partial pressures. The oxide nano-rod array structure can be developed on the metal substrate by removing the metallic matrix of the internal oxidation zone. Al2O3orMAl2O4(M=Ni or Fe) spinel nano-rod array structures were prepared by usingM(Al) solid solutions. Pack cementation process to develop M(Al) solid solution surface layers was used for the fabrication of nano-rod array structures on substrates with desired shape. Near-net shape Ni substrates with oxide nano-rod array structures on their surfaces can be prepared by using pack cementation and internal oxidation.

Nano Al2O3 Rod Array Structure Produced by Using Internal Oxidation of Dilute Ni(Al) Alloys

2019 ◽  
Vol 3 (14) ◽  
pp. 3-12 ◽  
Author(s):  
Makoto Nanko ◽  
Katsumi Uemura ◽  
Kazuyuki Takeda
Keyword(s):  
Internal Oxidation ◽  
Al Alloys ◽  
Array Structure ◽  
Rod Array
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