Powder Injection Moulding of Dental Ceramic Brackets Using Water Soluble Binder

Powder injection moulding (PIM) is one of mass production and cost effective near net shape processing, especially for small, complex-shaped components for high performance ceramic applications. Alumina has been generally known as one of the most widely used advanced ceramics due to its excellent pr...

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Main Authors: Nutthita Chuankrerkkul, Thanakorn Wasanapiarnpong, Khanittha Noomun
Format: บทความวารสาร
Language:English
Published: Science Faculty of Chiang Mai University 2019
Online Access:http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=9411
http://cmuir.cmu.ac.th/jspui/handle/6653943832/64197
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Institution: Chiang Mai University
Language: English
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spelling th-cmuir.6653943832-641972019-05-07T09:59:52Z Powder Injection Moulding of Dental Ceramic Brackets Using Water Soluble Binder Nutthita Chuankrerkkul Thanakorn Wasanapiarnpong Khanittha Noomun Powder injection moulding (PIM) is one of mass production and cost effective near net shape processing, especially for small, complex-shaped components for high performance ceramic applications. Alumina has been generally known as one of the most widely used advanced ceramics due to its excellent properties such as high hardness, high strength, as well as its wear resistance and bioinertness. This work investigates PIM technique for a fabrication of alumina and zirconia toughened alumina compounds for dental ceramic brackets application. A water soluble binder system, composed of a major fraction of polyethylene glycol (PEG) and a minor fraction polyvinyl butyral (PVB), has been studied in a preparation of feedstock for PIM. Injection moulding was carried out with a homemade laboratory scale equipment. PEG can be removed rapidly by water leaching. The remaining PVB is removed by subsequent calcination and the samples were then subjected to sintering. The development of feedstock formulations and processing parameters for the powder injection moulding of ceramic brackets has been investigated. The preliminary study showed that the water soluble binder can be used for the fabrication of alumina and zirconia toughened alumina parts by PIM technique. Samples retain their shape after leaching of the PEG in water. The rate of PEG removal is also fast at the initial stage. Density and microstructure of samples depended on feedstock formulars and sintering conditions. The relationship between processing parameters, properties and microstructure of the injection moulded samples were systematically examined. 2019-05-07T09:59:52Z 2019-05-07T09:59:52Z 2018 บทความวารสาร 0125-2526 http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=9411 http://cmuir.cmu.ac.th/jspui/handle/6653943832/64197 Eng Science Faculty of Chiang Mai University
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
language English
description Powder injection moulding (PIM) is one of mass production and cost effective near net shape processing, especially for small, complex-shaped components for high performance ceramic applications. Alumina has been generally known as one of the most widely used advanced ceramics due to its excellent properties such as high hardness, high strength, as well as its wear resistance and bioinertness. This work investigates PIM technique for a fabrication of alumina and zirconia toughened alumina compounds for dental ceramic brackets application. A water soluble binder system, composed of a major fraction of polyethylene glycol (PEG) and a minor fraction polyvinyl butyral (PVB), has been studied in a preparation of feedstock for PIM. Injection moulding was carried out with a homemade laboratory scale equipment. PEG can be removed rapidly by water leaching. The remaining PVB is removed by subsequent calcination and the samples were then subjected to sintering. The development of feedstock formulations and processing parameters for the powder injection moulding of ceramic brackets has been investigated. The preliminary study showed that the water soluble binder can be used for the fabrication of alumina and zirconia toughened alumina parts by PIM technique. Samples retain their shape after leaching of the PEG in water. The rate of PEG removal is also fast at the initial stage. Density and microstructure of samples depended on feedstock formulars and sintering conditions. The relationship between processing parameters, properties and microstructure of the injection moulded samples were systematically examined.
format บทความวารสาร
author Nutthita Chuankrerkkul
Thanakorn Wasanapiarnpong
Khanittha Noomun
spellingShingle Nutthita Chuankrerkkul
Thanakorn Wasanapiarnpong
Khanittha Noomun
Powder Injection Moulding of Dental Ceramic Brackets Using Water Soluble Binder
author_facet Nutthita Chuankrerkkul
Thanakorn Wasanapiarnpong
Khanittha Noomun
author_sort Nutthita Chuankrerkkul
title Powder Injection Moulding of Dental Ceramic Brackets Using Water Soluble Binder
title_short Powder Injection Moulding of Dental Ceramic Brackets Using Water Soluble Binder
title_full Powder Injection Moulding of Dental Ceramic Brackets Using Water Soluble Binder
title_fullStr Powder Injection Moulding of Dental Ceramic Brackets Using Water Soluble Binder
title_full_unstemmed Powder Injection Moulding of Dental Ceramic Brackets Using Water Soluble Binder
title_sort powder injection moulding of dental ceramic brackets using water soluble binder
publisher Science Faculty of Chiang Mai University
publishDate 2019
url http://it.science.cmu.ac.th/ejournal/dl.php?journal_id=9411
http://cmuir.cmu.ac.th/jspui/handle/6653943832/64197
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