Mechano-synthesis of niobium-aluminum superconductors for high field applications

被引：3

作者：

Calka, A ^{[1
]}

Wexler, D

Zhou, J

Sumption, MD

Collings, EW

机构：

[1] Univ Wollongong, Dept Mat Engn, Wollongong, NSW 2500, Australia

[2] Ohio State Univ, Dept Mat Sci & Engn, Appl Superconduct & Magnetism Labs, Columbus, OH 43210 USA

来源：

MECHANICALLY ALLOYED, METASTABLE AND NANOCRYSTALLINE MATERIALS, PART 2 | 1998年 / 269-2卷

关键词：

mechanical alloying; reactive ball milling; nanostructural powders; Nb3Al superconductors; intermetallics;

D O I：

10.4028/www.scientific.net/MSF.269-272.1043

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present investigations, magneto-mechano synthesis, using a novel milling technique, was applied to mixtures of Al and Nb powders milled in Ar under different milling conditions. Structural development was monitoring using x-ray diffractometry, thermal analysis, and reflected light and electron microscopy. Powders milled using the ball impact method, and under shearing mode with a strong magnetic pulling force on the balls were observed to agglomerate due to cold welding. However, powders milled under shearing, with intermediate pulling force displayed continuous structural evolution, with Nb-Al solid solution occurring within 30 h of milling. With increased milling time there was a rapid decrease in Nb3Al lattice parameter, which reached a limiting value of 0.5185nm at around 250h milling. Thee DTA traces indicated an activation energy (Ea) of 377kJ/mol) for formation of Nb3Al, much higher than that reported for grain growth only, but close to that for the self-diffusion of pure elements, Al and Nb.

引用

页码：1043 / 1048

页数：6

共 18 条

[1] FORMATION OF AMORPHOUS FE-B ALLOYS BY MECHANICAL ALLOYING [J].

CALKA, A ;

RADLINSKI, AP .

APPLIED PHYSICS LETTERS, 1991, 58 (02) :119-121

[2] UNIVERSAL HIGH-PERFORMANCE BALL-MILLING DEVICE AND ITS APPLICATION FOR MECHANICAL ALLOYING [J].

CALKA, A ;

RADLINSKI, AP .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 1991, 134 :1350-1353

[3]

Dew-Hughes D., 1971, REP PROG PHYS, V34, P821, DOI 10.1088/0034-4885/34/3/301

[4]

ENGLISH C, 1984, TMS AIME, P239

[5] Nanostructure formation by mechanical attrition [J].

Fecht, HJ .

NANOSTRUCTURED MATERIALS, 1995, 6 (1-4) :33-42

[6]

GROZA JR, 1993, P 2 INT C STRUCT APP, P327

[7] PHASE FORMATION IN MECHANICALLY ALLOYED NB-AL POWDERS [J].

HELLSTERN, E ;

SCHULTZ, L ;

BORMANN, R ;

LEE, D .

APPLIED PHYSICS LETTERS, 1988, 53 (15) :1399-1401

[8]

Iijima Y., 1996, ADV CRYO ENG, V42, P1447

[9] Mechanical alloying of Nb-Al powders [J].

Peng, ZX ;

Suryanarayana, C ;

Froes, FH .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (01) :41-48

[10] GRAIN-GROWTH KINETICS AND THERMAL-STABILITY IN A NANOCRYSTALLINE MULTIPHASE MIXTURE PREPARED BY LOW-ENERGY BALL-MILLING [J].

ROCK, C ;

OKAZAKI, K .

NANOSTRUCTURED MATERIALS, 1995, 5 (06) :657-671

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