Characterisation of mixing uniformity and rheological properties of alumina-zirconia powder for ceramic injection moulding

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The mixing uniformity and rheological properties of feedstock are crucial to the success of the ceramic injection moulding process. The suitability of developed feedstock may reduce the problems that arise during injection moulding, debinding and sintering. Therefore, this study is focused on identifying the optimum powder loading based on the mixing uniformity and rheological properties of materials. Uniformity characterisation of the mixture is determined based on the low torque value and at the steady state. Rheological studies were carried out using a capillary rheometer machine. The test was carried out at temperatures between 150 and 170°C with the applied loads between 20 and 90 kgf. The feedstock used was a combination of alumina-zirconia powder with a binder that consisted of high density polyethylene, paraffin wax and stearic acid. The feedstocks are found to be pseudoplastic with uniform mixing achieved in less than 30 min. The powder loading of 57% by volume is found to be optimum for the ceramic injection moulding process based on the low values of viscosity, power law index and flow activation energy.

Original languageEnglish
Pages (from-to)1311-1317
Number of pages7
JournalSains Malaysiana
Volume42
Issue number9
Publication statusPublished - Sep 2013

Fingerprint

Injection molding
Zirconia
Feedstocks
Alumina
Powders
Paraffin waxes
Stearic acid
Rheometers
High density polyethylenes
Binders
Sintering
Torque
Activation energy
Viscosity
Temperature

Keywords

  • Alumina-zirconia
  • Ceramic injection moulding
  • Mixing uniformity
  • Rheological behaviour

ASJC Scopus subject areas

  • General

Cite this

@article{672cc79718184bb89a1460f49437990f,
title = "Characterisation of mixing uniformity and rheological properties of alumina-zirconia powder for ceramic injection moulding",
abstract = "The mixing uniformity and rheological properties of feedstock are crucial to the success of the ceramic injection moulding process. The suitability of developed feedstock may reduce the problems that arise during injection moulding, debinding and sintering. Therefore, this study is focused on identifying the optimum powder loading based on the mixing uniformity and rheological properties of materials. Uniformity characterisation of the mixture is determined based on the low torque value and at the steady state. Rheological studies were carried out using a capillary rheometer machine. The test was carried out at temperatures between 150 and 170°C with the applied loads between 20 and 90 kgf. The feedstock used was a combination of alumina-zirconia powder with a binder that consisted of high density polyethylene, paraffin wax and stearic acid. The feedstocks are found to be pseudoplastic with uniform mixing achieved in less than 30 min. The powder loading of 57{\%} by volume is found to be optimum for the ceramic injection moulding process based on the low values of viscosity, power law index and flow activation energy.",
keywords = "Alumina-zirconia, Ceramic injection moulding, Mixing uniformity, Rheological behaviour",
author = "Ani, {Sarizal Md} and Andanastuti Muchtar and Norhamidi Muhamad and {A Ghani}, Jaharah",
year = "2013",
month = "9",
language = "English",
volume = "42",
pages = "1311--1317",
journal = "Sains Malaysiana",
issn = "0126-6039",
publisher = "Penerbit Universiti Kebangsaan Malaysia",
number = "9",

}

TY - JOUR

T1 - Characterisation of mixing uniformity and rheological properties of alumina-zirconia powder for ceramic injection moulding

AU - Ani, Sarizal Md

AU - Muchtar, Andanastuti

AU - Muhamad, Norhamidi

AU - A Ghani, Jaharah

PY - 2013/9

Y1 - 2013/9

N2 - The mixing uniformity and rheological properties of feedstock are crucial to the success of the ceramic injection moulding process. The suitability of developed feedstock may reduce the problems that arise during injection moulding, debinding and sintering. Therefore, this study is focused on identifying the optimum powder loading based on the mixing uniformity and rheological properties of materials. Uniformity characterisation of the mixture is determined based on the low torque value and at the steady state. Rheological studies were carried out using a capillary rheometer machine. The test was carried out at temperatures between 150 and 170°C with the applied loads between 20 and 90 kgf. The feedstock used was a combination of alumina-zirconia powder with a binder that consisted of high density polyethylene, paraffin wax and stearic acid. The feedstocks are found to be pseudoplastic with uniform mixing achieved in less than 30 min. The powder loading of 57% by volume is found to be optimum for the ceramic injection moulding process based on the low values of viscosity, power law index and flow activation energy.

AB - The mixing uniformity and rheological properties of feedstock are crucial to the success of the ceramic injection moulding process. The suitability of developed feedstock may reduce the problems that arise during injection moulding, debinding and sintering. Therefore, this study is focused on identifying the optimum powder loading based on the mixing uniformity and rheological properties of materials. Uniformity characterisation of the mixture is determined based on the low torque value and at the steady state. Rheological studies were carried out using a capillary rheometer machine. The test was carried out at temperatures between 150 and 170°C with the applied loads between 20 and 90 kgf. The feedstock used was a combination of alumina-zirconia powder with a binder that consisted of high density polyethylene, paraffin wax and stearic acid. The feedstocks are found to be pseudoplastic with uniform mixing achieved in less than 30 min. The powder loading of 57% by volume is found to be optimum for the ceramic injection moulding process based on the low values of viscosity, power law index and flow activation energy.

KW - Alumina-zirconia

KW - Ceramic injection moulding

KW - Mixing uniformity

KW - Rheological behaviour

UR - http://www.scopus.com/inward/record.url?scp=84882982623&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84882982623&partnerID=8YFLogxK

M3 - Article

VL - 42

SP - 1311

EP - 1317

JO - Sains Malaysiana

JF - Sains Malaysiana

SN - 0126-6039

IS - 9

ER -