Aluminum hollow sphere processing

被引：16

作者：

Nadler, JH ^{[1
]}

Sanders, TH ^{[1
]}

Cochran, JK ^{[1
]}

机构：

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

来源：

ALUMINIUM ALLOYS: THEIR PHYSICAL AND MECHANICAL PROPERTIES, PTS 1-3 | 2000年 / 331-3卷

关键词：

aluminium calcium alloys; aluminium spheres; metal foams; particle stabilization;

D O I：

10.4028/www.scientific.net/MSF.331-337.495

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new process has been developed to form hollow aluminum alloy spheres directly from the melt. These spheres are hermetic and have a relatively constant wall thickness and diameter. Spheres are formed through a pair of coaxial nozzles. The inner jet sustains a flow of inert gas while the annulus formed between the inner and outer jets carries a stream of molten metal. Axisymmetric instabilities in the hollow liquid metal jet result in pinched off bubbles that solidify as they fall through a flow controlled, inert atmosphere. Pure aluminum, eutectic aluminum-silicon, and aluminum-2% calcium were investigated as sphere producing materials. Al-2%Ca showed the most promise, due at least in part to the presence of oxide particles. Oxide particles promoted sphere stability and increased solidification rates.

引用

页码：495 / 500

页数：6

共 10 条

[1]

ABESI Y, 1999, THESIS NE U

[2] HOLLOW DROP PRODUCTION BY INJECTION OF GAS-BUBBLES INTO A LIQUID JET [J].

CALLIGER, RJ ;

TURNBULL, RJ ;

HENDRICKS, CD .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1977, 48 (07) :846-851

[3]

Chu P.R., 1991, THESIS GEORGIA I TEC

[4]

Jin I., 1990, U.S. Patent, Patent No. [4973358A, 4973358]

[5]

KENDALL JM, 1981, P 2 INT C DROPS BUBB, P79

[6]

LEE MC, 1983, SAMPE J NOV, P7

[7] Aluminum foam, "ALPORAS": The production process, properties and applications [J].

Miyoshi, T ;

Itoh, M ;

Akiyama, S ;

Kitahara, A .

POROUS AND CELLULAR MATERIALS FOR STRUCTURE APPLICATIONS, 1998, 521 :133-137

[8]

Rayleigh L., 1879, P R SOC LONDON, V29, P71, DOI DOI 10.1098/RSPL.1879.0015

[9]

Torobin L. B., 1987, U.S. Patent, Patent No. [4, 671, 909, 4671909]

[10]

YIM P, 1996, THESIS MIT

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