Fractographic analysis of vitreous calcia-alumina eutectic fibres produced by inviscid melt spinning (IMS)

Yun Mo Sung, Il Mo Sung

Research output: Contribution to journalArticle

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Abstract

The mechanical properties of inviscid melt spun (IMS) CaO-Al2O3 (46.5 wt % CaO-53.5 wt % Al2O3) eutectic fibres were examined by fractographic analysis as well as four-point bending and micro-indentation. The averaged fracture strength and elastic modulus values of the IMS Calcia-Alumina (CA) fibre were determined to be 460 MPa and 99.8 GPa, respectively by using four-point bending tests. The inner mirror constant (M) was determined to be 2.39 MPa · m1/2 by using the plot of the fracture strength (σf) obtained from the bending tests as a function of r-1/2, where r is the inner mirror radius measured from scanning electron microscopy (SEM) on the fractured CA fibres. The flaw-to-mirror ratio (c/r) for the CA fibre was calculated to be 1:11.24. Also, the critical flaw size (c) of the CA fibre was estimated to be 2.35 μm. The averaged elastic modulus value from Knoop micro-indentation was determined to be 102.5 GPa which is in good agreement with that from the four-point bending tests.

Original languageEnglish
Pages (from-to)4775-4778
Number of pages4
JournalJournal of Materials Science
Volume31
Issue number18
Publication statusPublished - 1996 Dec 1
Externally publishedYes

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Melt spinning
Aluminum Oxide
Eutectics
Alumina
Bending tests
Fibers
Mirrors
Indentation
Fracture toughness
Elastic moduli
Defects
lime
Mechanical properties
Scanning electron microscopy

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Fractographic analysis of vitreous calcia-alumina eutectic fibres produced by inviscid melt spinning (IMS). / Sung, Yun Mo; Sung, Il Mo.

In: Journal of Materials Science, Vol. 31, No. 18, 01.12.1996, p. 4775-4778.

Research output: Contribution to journalArticle

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