Article
Engineering, Industrial
Sebastien Rolere, Ulrich Soupremanien, Marc Bohnke, Myriam Dalmasso, Celine Delafosse, Richard Laucournet
Summary: Mn-Zn ferrite components were successfully produced using Powder Injection Molding (PIM) with a binder system containing paraffin wax, linear low density polyethylene, and stearic acid. The study found that maximal open porosity is a key parameter for defining the optimal solvent debinding duration, leading to a reduction in thermal debinding time and prevention of structural defects.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Hanlyun Cho, Jae Man Park, Junsuk Rho, Seong Jin Park
Summary: The study focused on investigating warpage defects in PIM manufacturing, revealing that the debinding heating rate has a dominant effect on structure warping and should be optimized accordingly.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Al Basir, Abu Bakar Sulong, Nashrah Hani Jamadon, Norhamidi Muhamad, Ukwueze Bonaventure Emeka
Summary: Powder injection molding (PIM) has evolved into micro-powder injection molding (mu PIM) and become a key manufacturing technique for producing components in electronic, automobile, and biomedical fields. This article reviews the important process parameters for fabricating parts with different materials using these techniques, and provides a brief discussion on future research guidelines in two-component macro and micro powder injection molding.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Al Basir, Norhamidi Muhamad, Abu Bakar Sulong, Muhammad bin Mohamed Amin, Nashrah Hani Jamadon, Nabilah Afiqah Mohd Radzuan
Summary: The micro-scale joining of two different materials using two-component micro-powder injection molding is a challenging technique due to the formation of defects. This study successfully fabricated defect-free bi-material micro-parts containing HA and 3YSZ by controlling the critical powder volume concentrations and viscosity ranges of the feedstocks.
Article
Chemistry, Physical
Grzegorz Matula, Aleksandra Szatkowska, Krzysztof Matus, Blazej Tomiczek, Miroslawa Pawlyta
Summary: The study fabricated cobalt-chromium-molybdenum alloy samples using the PIM method, obtaining components with good mechanical properties through thermal degradation and sintering.
Article
Engineering, Chemical
O. Ghanmi, V Demers
Summary: The moldability of titanium-based feedstocks used in low-pressure powder injection molding process was investigated through numerical simulation and real-scale injections. The thermal characteristics and rheological profiles of the feedstock were measured, and the filling stage of a complex shape part was simulated using Autodesk Moldflow Synergy 2019. The predicted filling time, powder segregation, and high shear rate zones were validated through laboratory experiments and analysis.
Article
Engineering, Chemical
Masoud Shahidi Moghadam, Abdolali Fayyaz, Mohammad Ardestani
Summary: This research studied the challenges of fabricating titanium components through low-pressure powder injection moulding (LPIM). It was found that feedstock with high powder loading was not suitable for LPIM, and suitable parameters for solvent debinding were obtained by soaking the samples in n-hexane at 60 degrees C temperature. After sintering, the hardness and density of the sintered part were 490 HV and 4.11 g/cm³, respectively, with coarse alpha plates and alpha/beta colonies observed in the microstructure.
Article
Engineering, Biomedical
Stephanie L. McNamara, Ethan M. McCarthy, Daniel F. Schmidt, Stephen P. Johnston, David L. Kaplan
Summary: Traditional bone fixation devices made from inert metal alloys provide structural strength for bone repair but are limited in their ability to actively promote bone healing. However, injection and compression molding techniques have successfully been used to manufacture composite silk-ceramic scaffolds comprising hydroxyapatite and silk fibroin, showing the potential for large-scale manufacturing of natural protein-based bone grafts and fixation devices. This work demonstrates a step closer towards moving bone tissue engineering to large-scale manufacturing of resorbable bone grafts and fixation devices based on natural proteins.
Article
Materials Science, Multidisciplinary
Nurul Nadiah Mahmud, Farah Atiqah Abdul Azam, Mohd Ikram Ramli, Farhana Mohd Foudzi, Kei Ameyama, Abu Bakar Sulong
Summary: This study presents a promising alternative approach in powder injection molding (PIM) process by utilizing irregular-shaped and bimodal size powder in Ti6Al4VHA composite. The irregular-shaped Ti6Al4V-HA exhibits good rheological behavior and low viscosity, producing crack-free parts with high relative density of 95% after sintering, showing excellent osseointegration properties. The findings suggest the suitability of irregular-shaped Ti6Al4V-HA as a useful alternative material for biomedical applications, especially in bone implantation.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Atefeh A. Tafti, Vincent Demers, Seyed Mohammad Majdi, Guillem Vachon, Vladimir Brailovski
Summary: Low-pressure powder injection molding (LPIM) is a cost-effective technology for producing intricate small metal parts, and this study aims to investigate the potential of manufacturing irregular commercial iron powder injection molded parts. The research found that the variation in pre-sintering temperature can affect the sintered density and pore characteristics.
Review
Chemistry, Physical
Vahid Momeni, Margarete Hufnagl, Zahra Shahroodi, Joamin Gonzalez-Gutierrez, Stephan Schuschnigg, Christian Kukla, Clemens Holzer
Summary: Powder injection molding (PIM) is a versatile technique for manufacturing net-shaped, complex parts using various materials. It can be separated into low-pressure (LPIM) and high-pressure (HPIM) injection molding. LPIM has recently gained attention for its ability to produce low-viscosity feedstocks and is suitable for both small-scale and mass production. LPIM offers economic benefits due to its use of low-cost equipment. However, establishing an optimal binder system for extremely low-pressure injection is challenging and can lead to defects throughout the process. This review paper provides an overview of the potential and characteristics of LPIM, addressing applications, challenges, and prospects, particularly in additive manufacturing and sensitive alloy processing.
Article
Materials Science, Multidisciplinary
Mohd Yusuf Zakaria, Mohd Ikram Ramli, Abu Bakar Sulong, Norhamidi Muhamad, Muhammad Hussain Ismail
Summary: This study identified critical PIM parameters for processing porous alloy titanium-hydroxyapatite composites via the space holder method, producing porous parts with a porosity level of 37.03%. The combination of PIM and the space holder method was found to be a promising technique for manufacturing near net-shaped porous titanium-hydroxyapatite composites.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Engineering, Chemical
Raphael Cote, Mohamed Azzouni, Vincent Demers
Summary: An experimental and numerical approach was used to study the impact of binder constituents and solid loading on titanium powder-based feedstocks for low-pressure powder injection molding. The optimal binder composition and maximum solid loading conditions were identified for producing intricate parts with minimal defects. Numerical simulations were validated with experiments, showing good agreement in predicting the melt front position during injection.
Article
Engineering, Chemical
Haifeng Lu, Yao Bian, Zongtao Wang, Xiaolei Guo, Haifeng Liu, Jiakun Cao, Kaichen Qu
Summary: Rheological study of powder flow is a hot topic in recent years. This paper provides a novel alternative method for powder rheological characterization using glass beads, pulverized coal and alumina as experimental materials. The relationship between differential pressure and particle velocity reveals the non-Newtonian rheological behaviors of powders.
Review
Materials Science, Multidisciplinary
Francisco Cavilha Neto, Mauricio Vitor Giaretton, Guilherme Oliveira Neves, Claudio Aguilar, Marcelo Tramontin Souza, Cristiano Binder, Aloisio Nelmo Klein
Summary: Titanium foams have gained increasing interest in the biomedical industry as biomimetic implants in the past two decades. The porous structure is crucial for bone adhesion and reducing elastic modulus to enhance compatibility with bone.
Article
Materials Science, Ceramics
Dongguo Lin, Seungryeol Yi, Jong Heo, Junghyun Lee, Randall M. German, Seong Jin Park
CERAMICS INTERNATIONAL
(2015)
Review
Materials Science, Multidisciplinary
Randall M. German
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2015)
Article
Chemistry, Physical
W. Daoush, A. Francis, Y. Lin, R. German
JOURNAL OF ALLOYS AND COMPOUNDS
(2015)
Article
Chemistry, Physical
Ayman Elsayed, Wei Li, Omayma A. El Kady, Walid M. Daoush, Eugene A. Olevsky, Randall M. German
JOURNAL OF ALLOYS AND COMPOUNDS
(2015)
Article
Nanoscience & Nanotechnology
Wei Li, Michael M. Porter, Eugene A. Olevsky, Randall M. German, Joanna McKittrick
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2015)
Article
Materials Science, Multidisciplinary
Jose A. Alvarado-Contreras, Eugene A. Olevsky, Andrey L. Maximenko, Randall M. German
Review
Materials Science, Multidisciplinary
Kunal H. Kate, Ravi K. Enneti, Seong-Jin Park, Randall M. German, Sundar V. Atre
CRITICAL REVIEWS IN SOLID STATE AND MATERIALS SCIENCES
(2014)
Article
Materials Science, Multidisciplinary
Seong Jin Park, John L. Johnson, Yunxin Wu, Young-Sam Kwon, Seong Lee, Randall M. German
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2013)
Article
Materials Science, Multidisciplinary
Jose A. Alvarado-Contreras, Eugene A. Olevsky, Andrey L. Maximenko, Randall M. German
JOURNAL OF MATERIALS SCIENCE
(2014)
Article
Mechanics
Jose A. Alvarado-Contreras, Eugene A. Olevsky, Randall M. German
MECHANICS RESEARCH COMMUNICATIONS
(2013)
Article
Materials Science, Multidisciplinary
Jose A. Alvarado-Contreras, Randall M. German, Andrey L. Maximenko, Eugene A. Olevsky
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2014)
Article
Materials Science, Multidisciplinary
Ridvan Yamanoglu, William Bradbury, Eugene A. Olevsky, Randall M. German
METALS AND MATERIALS INTERNATIONAL
(2013)
Article
Metallurgy & Metallurgical Engineering
R. Yamanoglu, W. Bradbury, E. Karakulak, E. A. Olevsky, R. M. German
Article
Engineering, Chemical
Randall M. German
Article
Engineering, Chemical
Jaeyoung Kim, Seokyoung Ahn, Sundar V. Atre, Seong Jin Park, Tae Gon Kang, Randall M. German
