The influence of autoclave steam on polymer and organic fibre modified ceramic shells

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The influence of autoclave steam on polymer and organic fibre modified ceramic shells. / Yuan, Chen; Jones, Samantha; Blackburn, Stuart.

In: Journal of the European Ceramic Society, Vol. 25, No. 7, 01.01.2005, p. 1081-1087.

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@article{e4db416d154b4c6bb47bc1e78cb8a155,
title = "The influence of autoclave steam on polymer and organic fibre modified ceramic shells",
abstract = "The removal of wax from an unfired ceramic shell system without cracking or dimensional alterations is a key stage within the investment casting process. The effect of autoclave steam on polymer and fibre modified investment casting mould behaviour has been investigated. The polymer modified system exhibited a higher mechanical strength in the green dry state, but that strength significantly reduced when subjected to a simulated autoclave {"}wet{"} condition, giving a 38% reduction in a flat bar section and a 45% reduction in an edge test. It is suggested that this is related to the softening of the latex particles when they are in contact with steam. In comparison the fibre modified system showed a much lower reduction in strength when subjected to {"}wet{"} conditions. Calculating the adjusted fracture load (AFL) bearing capacity for the extra shell thickness of the fibre system showed that the fibre system outperforms the polymer system when the samples were tested {"}wet{"}, showing a 33% increase in a flat bar section and an increase of over 150% in the more vulnerable edge region. The results suggest that the effect of moisture must be taken into account when studying the shell behaviour under autoclave conditions. (c) 2004 Elsevier Ltd. All rights reserved.",
keywords = "mould, investment casting, de-wax, fibre, steam",
author = "Chen Yuan and Samantha Jones and Stuart Blackburn",
year = "2005",
month = jan,
day = "1",
doi = "10.1016/j.jeurceramsoc.2004.04.011",
language = "English",
volume = "25",
pages = "1081--1087",
journal = "Journal of the European Ceramic Society",
issn = "0955-2219",
publisher = "Elsevier",
number = "7",

}

RIS

TY - JOUR

T1 - The influence of autoclave steam on polymer and organic fibre modified ceramic shells

AU - Yuan, Chen

AU - Jones, Samantha

AU - Blackburn, Stuart

PY - 2005/1/1

Y1 - 2005/1/1

N2 - The removal of wax from an unfired ceramic shell system without cracking or dimensional alterations is a key stage within the investment casting process. The effect of autoclave steam on polymer and fibre modified investment casting mould behaviour has been investigated. The polymer modified system exhibited a higher mechanical strength in the green dry state, but that strength significantly reduced when subjected to a simulated autoclave "wet" condition, giving a 38% reduction in a flat bar section and a 45% reduction in an edge test. It is suggested that this is related to the softening of the latex particles when they are in contact with steam. In comparison the fibre modified system showed a much lower reduction in strength when subjected to "wet" conditions. Calculating the adjusted fracture load (AFL) bearing capacity for the extra shell thickness of the fibre system showed that the fibre system outperforms the polymer system when the samples were tested "wet", showing a 33% increase in a flat bar section and an increase of over 150% in the more vulnerable edge region. The results suggest that the effect of moisture must be taken into account when studying the shell behaviour under autoclave conditions. (c) 2004 Elsevier Ltd. All rights reserved.

AB - The removal of wax from an unfired ceramic shell system without cracking or dimensional alterations is a key stage within the investment casting process. The effect of autoclave steam on polymer and fibre modified investment casting mould behaviour has been investigated. The polymer modified system exhibited a higher mechanical strength in the green dry state, but that strength significantly reduced when subjected to a simulated autoclave "wet" condition, giving a 38% reduction in a flat bar section and a 45% reduction in an edge test. It is suggested that this is related to the softening of the latex particles when they are in contact with steam. In comparison the fibre modified system showed a much lower reduction in strength when subjected to "wet" conditions. Calculating the adjusted fracture load (AFL) bearing capacity for the extra shell thickness of the fibre system showed that the fibre system outperforms the polymer system when the samples were tested "wet", showing a 33% increase in a flat bar section and an increase of over 150% in the more vulnerable edge region. The results suggest that the effect of moisture must be taken into account when studying the shell behaviour under autoclave conditions. (c) 2004 Elsevier Ltd. All rights reserved.

KW - mould

KW - investment casting

KW - de-wax

KW - fibre

KW - steam

UR - http://www.scopus.com/inward/record.url?scp=14744292150&partnerID=8YFLogxK

U2 - 10.1016/j.jeurceramsoc.2004.04.011

DO - 10.1016/j.jeurceramsoc.2004.04.011

M3 - Article

VL - 25

SP - 1081

EP - 1087

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

SN - 0955-2219

IS - 7

ER -