Effects of Porosity and Ni/Al Molar Ratio in Ni-Al Oxide Precursors on Porous Intermetallic Nickel Aluminide Nanopowders Prepared by Chemical Route

被引：7

作者：

Kobayashi, Yasukazu ^{[1
]}

Tada, Shohei ^{[2
]}

Kikuchi, Ryuji ^{[3
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Interdisciplinary Res Ctr Catalyt Chem, 1-1-1 Higashi, Tsukuba, Ibaraki 3058565, Japan

[2] Ibaraki Univ, Dept Mat Sci & Engn, 4-12-1 Nakanarusawacho, Hitachi, Ibaraki 3168511, Japan

[3] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, 7-3-1 Bongo, Tokyo 1138656, Japan

来源：

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN | 2020年 / 53卷 / 09期

关键词：

Nickel Aluminide; Intermetallic Compound; Porous Materials; Calcium Hydride; Molten LiCl; NANOSTRUCTURED NICKEL; CATALYTIC-ACTIVITY; FORMATION MECHANISM; NI3AL POWDER; BASE ALLOYS; NANOPARTICLES; PHASE; METHANE; NI5AL3; FOILS;

D O I：

10.1252/jcej.20we085

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

It is challenging to prepare intermetallic Ni-Al nanopowders via chemical processes due to the difficulty in reducing Al-based oxides. Previously, we successfully obtained the single phase porous nanopowders of Ni3Al and NiAl from the low porosity oxide precursors in molten LiCl-CaH2 at 600 degrees C. In this study, we examined the effects of porosity and the Ni/Al molar ratio of the oxide precursors on the BET surface areas and phases of the final Ni-Al nanopowders. The results showed that the porosity was not reflected in the final products, but the Ni/Al molar ratio defined the crystal structures. The intermetallic Ni5Al3 phase was not obtained at all, possibly due to the low rate of formation, whereas pure intermetallic Ni3Al and NiAl phases were obtained separately without any impurity phases.

引用

页码：562 / 568

页数：7

共 61 条

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