Powder Injection Molding of Implantable Grade Materials

2006 ◽  
Author(s):  
Donald F. Heaney
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
Microelectromechanical Systems ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Technology Readiness ◽  
Prosthetic Replacement ◽  
Cobalt Chromium ◽  
Component Size ◽  
Chromium Alloys

In this paper the attributes of powder injection molding that influence the ability to implant a material are evaluated. Specific emphasis is given to technology readiness of stainless steel, titanium and cobalt chromium alloys since these are the most common alloys that are both implantable and metal injection moldable. Issues such as ductility and strengthening are discussed. Also, component size capability of the technology is discussed since prosthetic replacement pushes the upper size limit of the technology and implantable micro devices that require MEMS (MicroElectroMechanical Systems) scale features push the lower limit.

Microstructure, Hardness, and Wear Resistance of Powder-Injection-Molded Products of Fe-Based Metamorphic Powders

2007 ◽  
Vol 26-28 ◽  
pp. 355-358
Author(s):  
Chang Kyu Kim ◽  
Chang Young Son ◽  
Dae Jin Ha ◽  
Tae Sik Yoon ◽  
Sung Hak Lee
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Wear Resistance ◽  
Injection Molding ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Thermally Stable ◽  
Austenitic Matrix ◽  
Amorphous Phases ◽  
Injection Molded

Powder injection molding (PIM) process was applied to Fe-based metamorphic alloy powders, and microstructure, hardness, and wear resistance of the PIM products were analyzed and compared with those of conventional PIM stainless steel products. When Fe-based metamorphic powders were injection-molded and then sintered at 1200 oC, completely densified products with almost no pores were obtained. They contained 34 vol.% of (Cr,Fe)2B borides dispersed in the austenitic matrix without amorphous phases. Since these (Cr,Fe)2B borides were very hard and thermally stable, hardness, and wear resistance of the PIM products of Fe-based metamorphic powders were twice as high as those of conventional PIM stainless steel products. Such property improvement suggested new applicability of the PIM products of Fe-based metamorphic powders to structures and parts requiring excellent mechanical properties.

scholarly journals Environmentally Efficient 316L Stainless Steel Feedstocks for Powder Injection Molding

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1296
Author(s):  
Berenika Hausnerova ◽  
Martin Novak
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
Mass Production ◽  
316L Stainless Steel ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
The Novel ◽  
Efficiency Enhancement ◽  
Optimum Conditions ◽  
Set Up

In this study, environmentally convenient highly metal powder filled feedstocks intended for powder injection molding is presented. The composition of 60 vol % 316L stainless steel gas atomized powder feedstocks containing semicrystalline waxes: acrawax or carnauba wax and paraffin wax, combined with polyethylene glycol and modifier, was optimized to provide defect-free parts. Rheological as well as thermogravimetric analyses supported with scanning electron microscopy and metallography were employed to set up optimum conditions for molding, debinding and sintering. The performance of the novel feedstock was compared with currently available polyolefines-based materials, and results showed an efficiency enhancement due to the substantially lower (about 100 °C) mixing and molding temperatures as well as a reduction of debinding and sintering times at the simultaneous achievement of better mechanical properties in terms of elongation and tensile strength, in comparison to the mass production feedstock.

scholarly journals Processing of Stainless Steel (SS316L)-Hydroxyapatite (HA) Powder Composite through Powder Injection Molding

2019 ◽  
Vol 1198 (4) ◽  
pp. 042017
Author(s):  
Mohd Ikram Ramli ◽  
Abu Bakar Sulong ◽  
Norhamidi Muhamad ◽  
Andanastuti Muchtar ◽  
Amir Arifin ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
Powder Injection Molding ◽  
Powder Composite ◽  
Powder Injection

Corrosion and Cytotoxicity Evaluation of AISI 316L Stainless Steel Produced by Powder Injection Molding (PIM) Technology

2005 ◽  
Vol 498-499 ◽  
pp. 86-92 ◽  
Author(s):  
Isolda Costa ◽  
Sizue Ota Rogero ◽  
Olandir Vercino Correa ◽  
Clarice Terui Kunioshi ◽  
Mitiko Saiki
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
316L Stainless Steel ◽  
Electrochemical Techniques ◽  
Powder Injection Molding ◽  
Powder Injection ◽  
Cytotoxicity Test ◽  
Aisi 316L ◽  
Aisi 316L Stainless Steel

This study investigates the in vitro corrosion and cytotoxicity response of AISI 316L stainless steel produced by powder injection molding (PIM) technology in a solution that simulates physiological fluids (MEM) by electrochemical techniques and neutral red uptake cytotoxicity assay. The results were compared with those of AISI 316L produced by conventional metallurgy. Both steels showed high corrosion resistance and no toxic effect in the cytotoxicity test. The corrosion products were analyzed by instrumental neutron activation analysis (INAA). The surfaces of the alloys were evaluated before and after corrosion test by scanning electron microscopy and a passive behaviour was indicated supporting the results from other techniques.

Mixing and characterisation of 316L stainless steel feedstock for micro powder injection molding

2005 ◽  
Vol 54 (3) ◽  
pp. 230-238 ◽  
Author(s):  
L. Liu ◽  
N.H. Loh ◽  
B.Y. Tay ◽  
S.B. Tor ◽  
Y. Murakoshi ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Injection Molding ◽  
316L Stainless Steel ◽  
Powder Injection Molding ◽  
Powder Injection
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