The oxidation of nanocrystalline Ni3Al fabricated by mechanical alloying and spark plasma sintering

Guojian Cao; Lin Geng; Zhenzhu Zheng; Masaaki Naka

doi:10.1016/j.intermet.2007.07.003

The oxidation of nanocrystalline Ni₃Al fabricated by mechanical alloying and spark plasma sintering

Guojian Cao^*
, Lin Geng
, Zhenzhu Zheng
, Masaaki Naka

^*Corresponding author for this work

Harbin Institute of Technology
The University of Osaka

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

Nanocrystalline Ni₃Al was fabricated through mechanical alloying of elemental powders and spark plasma sintering. The nanocrystalline Ni₃Al has a nearly full density after being sintered at 1223 K for 10 min under a pressure of 65 MPa. Isothermal and cyclic oxidations of nanocrystalline Ni₃Al were tested at 1173-1373 K with intervals of 100 K. The results indicate that nanocrystalline Ni₃Al exhibits excellent isothermal and cyclical oxidation resistance. The oxide scales consist primarily of dense and continuous α-Al₂O₃. The grain refinement is beneficial for improving the oxidation resistance of Ni₃Al by providing more nucleation centers for the Al₂O₃ formation, promoting the selective formation of Al₂O₃ and improving the adhesion of oxide scales to the matrix.

Original language	English
Pages (from-to)	1672-1677
Number of pages	6
Journal	Intermetallics
Volume	15
Issue number	12
DOIs	https://doi.org/10.1016/j.intermet.2007.07.003
State	Published - Dec 2007
Externally published	Yes

Keywords

A. Nanostructured intermetallics
A. Nickel aluminides, based on NiAl
B. Oxidation
C. Powder metallurgy

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10.1016/j.intermet.2007.07.003

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title = "The oxidation of nanocrystalline Ni3Al fabricated by mechanical alloying and spark plasma sintering",

abstract = "Nanocrystalline Ni3Al was fabricated through mechanical alloying of elemental powders and spark plasma sintering. The nanocrystalline Ni3Al has a nearly full density after being sintered at 1223 K for 10 min under a pressure of 65 MPa. Isothermal and cyclic oxidations of nanocrystalline Ni3Al were tested at 1173-1373 K with intervals of 100 K. The results indicate that nanocrystalline Ni3Al exhibits excellent isothermal and cyclical oxidation resistance. The oxide scales consist primarily of dense and continuous α-Al2O3. The grain refinement is beneficial for improving the oxidation resistance of Ni3Al by providing more nucleation centers for the Al2O3 formation, promoting the selective formation of Al2O3 and improving the adhesion of oxide scales to the matrix.",

keywords = "A. Nanostructured intermetallics, A. Nickel aluminides, based on NiAl, B. Oxidation, C. Powder metallurgy",

author = "Guojian Cao and Lin Geng and Zhenzhu Zheng and Masaaki Naka",

year = "2007",

month = dec,

doi = "10.1016/j.intermet.2007.07.003",

language = "英语",

volume = "15",

pages = "1672--1677",

journal = "Intermetallics",

issn = "0966-9795",

publisher = "Elsevier Ltd",

number = "12",

}

TY - JOUR

T1 - The oxidation of nanocrystalline Ni3Al fabricated by mechanical alloying and spark plasma sintering

AU - Cao, Guojian

AU - Geng, Lin

AU - Zheng, Zhenzhu

AU - Naka, Masaaki

PY - 2007/12

Y1 - 2007/12

N2 - Nanocrystalline Ni3Al was fabricated through mechanical alloying of elemental powders and spark plasma sintering. The nanocrystalline Ni3Al has a nearly full density after being sintered at 1223 K for 10 min under a pressure of 65 MPa. Isothermal and cyclic oxidations of nanocrystalline Ni3Al were tested at 1173-1373 K with intervals of 100 K. The results indicate that nanocrystalline Ni3Al exhibits excellent isothermal and cyclical oxidation resistance. The oxide scales consist primarily of dense and continuous α-Al2O3. The grain refinement is beneficial for improving the oxidation resistance of Ni3Al by providing more nucleation centers for the Al2O3 formation, promoting the selective formation of Al2O3 and improving the adhesion of oxide scales to the matrix.

AB - Nanocrystalline Ni3Al was fabricated through mechanical alloying of elemental powders and spark plasma sintering. The nanocrystalline Ni3Al has a nearly full density after being sintered at 1223 K for 10 min under a pressure of 65 MPa. Isothermal and cyclic oxidations of nanocrystalline Ni3Al were tested at 1173-1373 K with intervals of 100 K. The results indicate that nanocrystalline Ni3Al exhibits excellent isothermal and cyclical oxidation resistance. The oxide scales consist primarily of dense and continuous α-Al2O3. The grain refinement is beneficial for improving the oxidation resistance of Ni3Al by providing more nucleation centers for the Al2O3 formation, promoting the selective formation of Al2O3 and improving the adhesion of oxide scales to the matrix.

KW - A. Nanostructured intermetallics

KW - A. Nickel aluminides, based on NiAl

KW - B. Oxidation

KW - C. Powder metallurgy

UR - https://www.scopus.com/pages/publications/34848842142

U2 - 10.1016/j.intermet.2007.07.003

DO - 10.1016/j.intermet.2007.07.003

M3 - 文章

AN - SCOPUS:34848842142

SN - 0966-9795

VL - 15

SP - 1672

EP - 1677

JO - Intermetallics

JF - Intermetallics

IS - 12

ER -

The oxidation of nanocrystalline Ni₃Al fabricated by mechanical alloying and spark plasma sintering

Abstract

Keywords

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