BREAKAGE BEHAVIOR OF FINE PARTICLES OF BRITTLE MINERALS AND COALS

被引：51

作者：

SIKONG, L ^{[1
]}

HASHIMOTO, H ^{[1
]}

YASHIMA, S ^{[1
]}

机构：

[1] TOHOKU UNIV,FAC ENGN,DEPT MAT PROC,SENDAI,MIYAGI 980,JAPAN

来源：

POWDER TECHNOLOGY | 1990年 / 61卷 / 01期

关键词：

12;

D O I：

10.1016/0032-5910(90)80065-7

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Breakage behavior of fine single particles of five minerals and two coals in a size range from 88 /gmm to 1 μm was investigated by compression tests. Strength of the particles varies with particle size and their relation is similar to that of coarser particles previously given by Yashima ea. Specific fracture energy has a tendency to increase with decreasing particle size. Particles under a few micrometres deformed to a considerable extent without fracture. It may suggest even brittle materials deformed plastically. Local plastic deformation was also observed in fractured coarser particles. Critical sizes of this elastic/partially-plastic behavior and of partially-plastic/fully-plastic behavior were estimated based on theory of elasticity and microscopic observation of the particles after compression. © 1990.

引用

页码：51 / 57

页数：7

共 12 条

[1]

[Anonymous], 1966, INT J ROCK MECH MIN, DOI DOI 10.1016/0148-9062(66)90002-7

[2] X-RAY LINE BROADENING IN METALS [J].

HALL, WH .

PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON SECTION A, 1949, 62 (359) :741-743

[3] MICRODEFORMATION OF SOLIDS [J].

MACMILLAN, NH ;

GANE, N .

JOURNAL OF APPLIED PHYSICS, 1970, 41 (02) :672-+

[4] EFFECT OF RANK AND PARTICLE SIZE ON PLASTIC BEHAVIOUR OF COAL [J].

PARISH, BM .

BRITISH JOURNAL OF APPLIED PHYSICS, 1967, 18 (02) :233-&

[5] HARDNESS MEASUREMENT AT PENETRATION DEPTHS AS SMALL AS 20-NM [J].

PETHICA, JB ;

HUTCHINGS, R ;

OLIVER, WC .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1983, 48 (04) :593-606

[6] PHYSICAL ASPECTS OF COMMINUTION AND NEW FORMULATION OF A LAW OF COMMINUTION [J].

RUMPF, H .

POWDER TECHNOLOGY, 1973, 7 (03) :145-159

[7]

SENNA M, 1985, ADV CHEM ENG JAPAN, V19

[8]

SIKONG L, 1989, THESIS TOHOKU U

[9]

Steier K, 1972, DECHEMA MONOGR, V69, P167

[10]

TIMOSHENKO SP, 1970, THEORY ELASTICITY, P420

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