Nanocrystalline Ni3Al-based alloys produced by mechanical alloying of Ni-Al-Co powders and consolidation

被引：3
|
作者：
Antolak-Dudka, Anna [1 ]
Krasnowski, Marek [1 ]
Kulik, Tadeusz [1 ]
机构：
[1] Warsaw Univ Technol, Fac Mat Sci & Engn, PL-02507 Warsaw, Poland
来源：
PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 7 NO 5 | 2010年 / 7卷 / 05期
关键词：
alloys; powder processing; nanocrystallites; solid-state transitions; microhardness; HOT-PRESSING CONSOLIDATION; PHASE-TRANSFORMATIONS; NICKEL ALUMINIDES; MILLING PRODUCT; NI3AL;
D O I：
10.1002/pssc.200983379
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, preparation of nanocrystalline Ni(3)Al-based alloys by mechanical alloying process followed by hot-pressing consolidation is reported. Ni(75)Al(20)Co(5) and Ni(70)Al(25)Co(5) elemental powder mixtures were subjected to ball milling. Subsequently, the milling products were sintered at 1000 degrees C under a pressure of 7.7 GPa. The powders and the consolidated pellets were investigated by X-ray diffraction. The results obtained show that the milling products were in both cases supersaturated solid solutions Ni(Al,Co) and that during the hot-pressing consolidation they had transformed into nanocrystalline Ni(3)Al-based intermetallic compounds. The microhardness of the produced Ni(3)Al-based alloys is 918 HV0.1 in the case of Ni(75)Al(20)Co(5) composition and 1033 HV0.1 in the second case. The density of compacted materials is close to the theoretical value and their open porosity is negligible. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：1384 / 1387
页数：4
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