Fabrication of miniature components from ZrO2 powder by combining electrical-field activated sintering technique and micro-forming

Hasan Hijji, Yi Qin, Kunlan Huang, Muhammad Bin Zulkipli, Jie Zhao

Research output: Contribution to conferencePaper

Abstract

There is an increased demand for miniature/micro products (such as MEMS) and nanotechnology-based products (such as nano-materials). Micro-manufacturing is a link between Macro-and Nano Manufacturing and an effective means for transferring nanotechnology-product designs into volume production. The micro forming has the potential for low-cost, high volume manufacturing applications. In order to meet the high demands on miniaturised products, a rapid production technique and the system, high flexibility, cost-effectiveness and processing a wide range of materials are needed. Recently, a series of studies have been undertaken to investigate forming miniature/micro-components by using a combination of micro-forming and Electrical-field activated sintering (Micro-FAST). The process uses low voltage and high current density, pressure-assisted densification and synthesis technique, which renders several significant merits. The work to be reported in this paper will be focused on the forming of miniature components from Zirconia (ZrO2) powder, without using binders. Several processing parameters have been investigated, such as pressure, heating rate, heating temperature and holding time, which helped to obtain high-quality parts. Using graphite dies and punches, sample parts (solid cylinders of Ø4.00mm × 4.00 mm) were formed. These were subjected to detailed examinations and analysis, such as analysis of the relative density, hardness at the necks formed among the particles and in the particle bodies, as well as the microstructures. The results showed that directly forming the parts from loose powder is feasible, and by properly designing and control the processing parameters, high-quality parts could be achieved, among which heating temperature and holding time are extremely important. At the same time, due to low conductivity of the powder material, carefully designing the tooling is essentials for ensuring properly heating, pressurisation and cooling.
Original languageEnglish
Number of pages6
DOIs
Publication statusPublished - 17 Sep 2018
EventThe 5th International Conference On New Forming Technology - BIAS- Bremer Institut für angewandte Strahltechnik GmbH , Bremen, Germany
Duration: 18 Sep 201821 Sep 2018
http://icnft2018.com

Conference

ConferenceThe 5th International Conference On New Forming Technology
Abbreviated title ICNFT2018
CountryGermany
CityBremen
Period18/09/1821/09/18
Internet address

Fingerprint

Powders
Sintering
Fabrication
Nanotechnology
Heating
Processing
Graphite
Pressurization
Cost effectiveness
Heating rate
Densification
Product design
Zirconia
MEMS
Binders
Macros
Current density
Hardness
Cooling
Temperature

Keywords

  • micro forming
  • sintering
  • powder
  • zirconia (ZrO2) powder
  • electrical-field activated sintering

Cite this

Hijji, Hasan ; Qin, Yi ; Huang, Kunlan ; Bin Zulkipli, Muhammad ; Zhao, Jie. / Fabrication of miniature components from ZrO2 powder by combining electrical-field activated sintering technique and micro-forming. Paper presented at The 5th International Conference On New Forming Technology, Bremen, Germany.6 p.
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title = "Fabrication of miniature components from ZrO2 powder by combining electrical-field activated sintering technique and micro-forming",
abstract = "There is an increased demand for miniature/micro products (such as MEMS) and nanotechnology-based products (such as nano-materials). Micro-manufacturing is a link between Macro-and Nano Manufacturing and an effective means for transferring nanotechnology-product designs into volume production. The micro forming has the potential for low-cost, high volume manufacturing applications. In order to meet the high demands on miniaturised products, a rapid production technique and the system, high flexibility, cost-effectiveness and processing a wide range of materials are needed. Recently, a series of studies have been undertaken to investigate forming miniature/micro-components by using a combination of micro-forming and Electrical-field activated sintering (Micro-FAST). The process uses low voltage and high current density, pressure-assisted densification and synthesis technique, which renders several significant merits. The work to be reported in this paper will be focused on the forming of miniature components from Zirconia (ZrO2) powder, without using binders. Several processing parameters have been investigated, such as pressure, heating rate, heating temperature and holding time, which helped to obtain high-quality parts. Using graphite dies and punches, sample parts (solid cylinders of {\O}4.00mm × 4.00 mm) were formed. These were subjected to detailed examinations and analysis, such as analysis of the relative density, hardness at the necks formed among the particles and in the particle bodies, as well as the microstructures. The results showed that directly forming the parts from loose powder is feasible, and by properly designing and control the processing parameters, high-quality parts could be achieved, among which heating temperature and holding time are extremely important. At the same time, due to low conductivity of the powder material, carefully designing the tooling is essentials for ensuring properly heating, pressurisation and cooling.",
keywords = "micro forming, sintering, powder, zirconia (ZrO2) powder, electrical-field activated sintering",
author = "Hasan Hijji and Yi Qin and Kunlan Huang and {Bin Zulkipli}, Muhammad and Jie Zhao",
year = "2018",
month = "9",
day = "17",
doi = "10.1051/matecconf/201819010007",
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note = "The 5th International Conference On New Forming Technology, ICNFT2018 ; Conference date: 18-09-2018 Through 21-09-2018",
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Hijji, H, Qin, Y, Huang, K, Bin Zulkipli, M & Zhao, J 2018, 'Fabrication of miniature components from ZrO2 powder by combining electrical-field activated sintering technique and micro-forming' Paper presented at The 5th International Conference On New Forming Technology, Bremen, Germany, 18/09/18 - 21/09/18, . https://doi.org/10.1051/matecconf/201819010007

Fabrication of miniature components from ZrO2 powder by combining electrical-field activated sintering technique and micro-forming. / Hijji, Hasan; Qin, Yi; Huang, Kunlan; Bin Zulkipli, Muhammad; Zhao, Jie.

2018. Paper presented at The 5th International Conference On New Forming Technology, Bremen, Germany.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Fabrication of miniature components from ZrO2 powder by combining electrical-field activated sintering technique and micro-forming

AU - Hijji, Hasan

AU - Qin, Yi

AU - Huang, Kunlan

AU - Bin Zulkipli, Muhammad

AU - Zhao, Jie

PY - 2018/9/17

Y1 - 2018/9/17

N2 - There is an increased demand for miniature/micro products (such as MEMS) and nanotechnology-based products (such as nano-materials). Micro-manufacturing is a link between Macro-and Nano Manufacturing and an effective means for transferring nanotechnology-product designs into volume production. The micro forming has the potential for low-cost, high volume manufacturing applications. In order to meet the high demands on miniaturised products, a rapid production technique and the system, high flexibility, cost-effectiveness and processing a wide range of materials are needed. Recently, a series of studies have been undertaken to investigate forming miniature/micro-components by using a combination of micro-forming and Electrical-field activated sintering (Micro-FAST). The process uses low voltage and high current density, pressure-assisted densification and synthesis technique, which renders several significant merits. The work to be reported in this paper will be focused on the forming of miniature components from Zirconia (ZrO2) powder, without using binders. Several processing parameters have been investigated, such as pressure, heating rate, heating temperature and holding time, which helped to obtain high-quality parts. Using graphite dies and punches, sample parts (solid cylinders of Ø4.00mm × 4.00 mm) were formed. These were subjected to detailed examinations and analysis, such as analysis of the relative density, hardness at the necks formed among the particles and in the particle bodies, as well as the microstructures. The results showed that directly forming the parts from loose powder is feasible, and by properly designing and control the processing parameters, high-quality parts could be achieved, among which heating temperature and holding time are extremely important. At the same time, due to low conductivity of the powder material, carefully designing the tooling is essentials for ensuring properly heating, pressurisation and cooling.

AB - There is an increased demand for miniature/micro products (such as MEMS) and nanotechnology-based products (such as nano-materials). Micro-manufacturing is a link between Macro-and Nano Manufacturing and an effective means for transferring nanotechnology-product designs into volume production. The micro forming has the potential for low-cost, high volume manufacturing applications. In order to meet the high demands on miniaturised products, a rapid production technique and the system, high flexibility, cost-effectiveness and processing a wide range of materials are needed. Recently, a series of studies have been undertaken to investigate forming miniature/micro-components by using a combination of micro-forming and Electrical-field activated sintering (Micro-FAST). The process uses low voltage and high current density, pressure-assisted densification and synthesis technique, which renders several significant merits. The work to be reported in this paper will be focused on the forming of miniature components from Zirconia (ZrO2) powder, without using binders. Several processing parameters have been investigated, such as pressure, heating rate, heating temperature and holding time, which helped to obtain high-quality parts. Using graphite dies and punches, sample parts (solid cylinders of Ø4.00mm × 4.00 mm) were formed. These were subjected to detailed examinations and analysis, such as analysis of the relative density, hardness at the necks formed among the particles and in the particle bodies, as well as the microstructures. The results showed that directly forming the parts from loose powder is feasible, and by properly designing and control the processing parameters, high-quality parts could be achieved, among which heating temperature and holding time are extremely important. At the same time, due to low conductivity of the powder material, carefully designing the tooling is essentials for ensuring properly heating, pressurisation and cooling.

KW - micro forming

KW - sintering

KW - powder

KW - zirconia (ZrO2) powder

KW - electrical-field activated sintering

U2 - 10.1051/matecconf/201819010007

DO - 10.1051/matecconf/201819010007

M3 - Paper

ER -