Solvent de-binding of bi-material green component of two-component powder injection moulded stainless steel and zirconia

Research output: Contribution to journalArticle

Abstract

Solvent de-binding is a critical step in implementation of a powder injection moulding process which may lead to defect formation, if neglected and cannot be reversed in subsequent stages. In this study, stainless steel (17-4PH) and zirconia (3YSZ) feedstocks were prepared based on two-binder system consisting of palm stearin (PS) and low-density polyethylene (LDPE). The rheological investigation of the feedstocks revealed that both of them possess characteristics suitable for injection moulding. The feedstocks were subsequently injected to form a bi-material component via two-component injection moulding process (2C-PIM). To predict the solvent optimum de-binding time, single and bi-material green components of SS17-4PH and 3YSZ were extracted in acetone. Next, the bi-materials were further pyrolyzed in argon environment and isothermally sintered for 2h at 1300°C in a vacuum atmosphere. SEM observations indicated no defects on the bi-materials.

Original languageEnglish
Pages (from-to)96-104
Number of pages9
JournalInternational Journal of Mechanical and Mechatronics Engineering
Volume18
Issue number3
Publication statusPublished - 1 Jun 2018

Fingerprint

Zirconia
Stainless steel
Injection molding
Feedstocks
Powders
Defects
Low density polyethylenes
Acetone
Binders
Argon
Vacuum
Scanning electron microscopy

Keywords

  • 2C-PIM
  • Rheology
  • Sintering
  • Solvent de-binding
  • Thermal de-binding

ASJC Scopus subject areas

  • Engineering(all)

Cite this

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title = "Solvent de-binding of bi-material green component of two-component powder injection moulded stainless steel and zirconia",
abstract = "Solvent de-binding is a critical step in implementation of a powder injection moulding process which may lead to defect formation, if neglected and cannot be reversed in subsequent stages. In this study, stainless steel (17-4PH) and zirconia (3YSZ) feedstocks were prepared based on two-binder system consisting of palm stearin (PS) and low-density polyethylene (LDPE). The rheological investigation of the feedstocks revealed that both of them possess characteristics suitable for injection moulding. The feedstocks were subsequently injected to form a bi-material component via two-component injection moulding process (2C-PIM). To predict the solvent optimum de-binding time, single and bi-material green components of SS17-4PH and 3YSZ were extracted in acetone. Next, the bi-materials were further pyrolyzed in argon environment and isothermally sintered for 2h at 1300°C in a vacuum atmosphere. SEM observations indicated no defects on the bi-materials.",
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author = "Ukwueze, {Bonaventure Emeka} and Sulong, {Abu Bakar} and Norhamidi Muhamad and Zainuddin Sajuri",
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AU - Ukwueze, Bonaventure Emeka

AU - Sulong, Abu Bakar

AU - Muhamad, Norhamidi

AU - Sajuri, Zainuddin

PY - 2018/6/1

Y1 - 2018/6/1

N2 - Solvent de-binding is a critical step in implementation of a powder injection moulding process which may lead to defect formation, if neglected and cannot be reversed in subsequent stages. In this study, stainless steel (17-4PH) and zirconia (3YSZ) feedstocks were prepared based on two-binder system consisting of palm stearin (PS) and low-density polyethylene (LDPE). The rheological investigation of the feedstocks revealed that both of them possess characteristics suitable for injection moulding. The feedstocks were subsequently injected to form a bi-material component via two-component injection moulding process (2C-PIM). To predict the solvent optimum de-binding time, single and bi-material green components of SS17-4PH and 3YSZ were extracted in acetone. Next, the bi-materials were further pyrolyzed in argon environment and isothermally sintered for 2h at 1300°C in a vacuum atmosphere. SEM observations indicated no defects on the bi-materials.

AB - Solvent de-binding is a critical step in implementation of a powder injection moulding process which may lead to defect formation, if neglected and cannot be reversed in subsequent stages. In this study, stainless steel (17-4PH) and zirconia (3YSZ) feedstocks were prepared based on two-binder system consisting of palm stearin (PS) and low-density polyethylene (LDPE). The rheological investigation of the feedstocks revealed that both of them possess characteristics suitable for injection moulding. The feedstocks were subsequently injected to form a bi-material component via two-component injection moulding process (2C-PIM). To predict the solvent optimum de-binding time, single and bi-material green components of SS17-4PH and 3YSZ were extracted in acetone. Next, the bi-materials were further pyrolyzed in argon environment and isothermally sintered for 2h at 1300°C in a vacuum atmosphere. SEM observations indicated no defects on the bi-materials.

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