Metal injection moulding of gamma titanium aluminide alloy powder

Gerling, R.; Aust, E.; Limberg, Wolfgang; Pfuff, M.; Schimansky, F.P.

doi:10.1016/j.msea.2006.02.002

Cited by 52 publications

(22 citation statements)

References 10 publications

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“…This figure indicate while as-MIM samples have a large fraction of porosities (4.5 vol%) but an almost pore free microstructure obtained after HIP process. However, the ductility of the samples did not improved after HIP due to the high oxygen level [112].…”

Section: D) Titanium Aluminides (Tial)mentioning

confidence: 93%

“…However, the mechanical properties of the manufactured parts was low (even after post HIP) compared with cast alloys mostly due to the high impurity level (O, C and N). Figure 8 represents the microstructures of MIM proceeds TiAl samples and after HIP process [112]. This figure indicate while as-MIM samples have a large fraction of porosities (4.5 vol%) but an almost pore free microstructure obtained after HIP process.…”

Section: D) Titanium Aluminides (Tial)mentioning

confidence: 95%

“…followed by HIP process [112] Further studies improved the properties of MIM fabricated TiAl components by improving the process parameters, binder systems and composition of materials [62,64,113]. Table 2 summarizes some results obtained from MIM of TiAl components.…”

Section: Figure 8 Optical Microstructure Of -Tial Produced By (A) Mmentioning

confidence: 99%

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Metal injection moulding of titanium and titanium alloys: Challenges and recent development

et al. 2017

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Section: D) Titanium Aluminides (Tial)mentioning

confidence: 93%

Section: D) Titanium Aluminides (Tial)mentioning

confidence: 95%

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Metal injection moulding of titanium and titanium alloys: Challenges and recent development

et al. 2017

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“…The MIM process was a combination of powder metallurgy and plastic injection molding technologies. Many materials have been produced by MIM such as 316 L stainless steel (Loh et al, 2001), TiAl alloy (Gerling et al, 2006), etc. In the present study, MIM was used to fabricate the porous NiTi SMA.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of high porous NiTi shape memory alloy by metal injection molding

Zhang

Yunliang

et al. 2008

Journal of Materials Processing Technology

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“…Electroforming is another techniques used for fabrication metallic microparts, [5][6] but its slow fabrication process makes the production of 0.5 mm or thicker components very difficult. In addition, Microinjection molding (MIM) is a fabrication process which has been used for polymers, [7] metals, [8] alloys, [9] and ceramics. [10] MIM usually replies on precise metal molds fabricated either by micro-EDM and the metallic components are limited by the precision of micro-EDM.…”

mentioning

confidence: 99%

A Soft Molding Process for Fabrication of Micromachine Parts from Stainless Steel Powder

2009

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Micrometallic machine parts have important applications watch making industry, instrumentation and medical devices [1] and its related fabrication technology has been widely studied. Microelectro-discharge machining (micro-EDM) is one of the fabrication techniques in which different types of miniatures components are fabricated. [2][3] EDM is limited in the fabrication of the nonconductive materials. Laser micromachining is another fabrication technique used for drilling and cutting microcomponents [4] This method is expensive; because of the equipment it relies on, and produces a relatively rough edge with burnt traces, which affect the applications of the microcomponents. Electroforming is another techniques used for fabrication metallic microparts, [5][6] but its slow fabrication process makes the production of 0.5 mm or thicker components very difficult. In addition, Microinjection molding (MIM) is a fabrication process which has been used for polymers, [7] metals, [8] alloys, [9] and ceramics. [10] MIM usually replies on precise metal molds fabricated either by micro-EDM and the metallic components are limited by the precision of micro-EDM.This paper presents an approach to fabricate 316-L stainless steel micromachine parts. Figure 1 shows a linking rod with all dimensions. The thickness of the component is 1000 mm and the diameters of the two holes are 500 and 250 mm, respectively. The fabrication is based on soft lithography and powder metallurgical process, which are further developed from the previous successful experience in fabrication of microcomponents. [11][12][13] The process includes production of high quality micro-SU-8 master molds and their negative replicas in polydimethylsiloxane (PDMS). Then the PDMS soft molds are filled with stainless steel slurry containing 316-L stainless steel particles and binder. After the slurry is dry, the green patterns are removed from the PDMS molds, de-bound, and sintered in the tube furnace at 1300 containing forming gas atmosphere. Figure 2 gives a schematic diagram of the complete fabrication process from producing master mold to the final metallic components. The fabrication processes were investigated. SU-8 Master Molds and PDMS Negative ReplicasSU-8 is a negative tone epoxy type photo resist and has very low UV absorbance in wavelengths ranging from 360 to 420 nm. This property enables a homogenous exposure from the top to the bottom of the resist layer and results in excellent vertical sidewalls. UV lithography is one of the most important SU-8 fabrication techniques and 1 mm thick SU-8 components were produced. [14] The process costs much less when compared with X-ray lithography. [15] The fabrication process of SU-8 master mold used in this research was based on the previews work, [11][12]14] and modifications were made due to the change of the SU-8 type. In this work, SU-8 2075 (MicroChem, USA) was used for fabricating microconnecting rod master mold with dimension shown in Figure 1. TheSU-8 mold fabrication steps were carried out as follow: i) cast SU...

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Metal injection moulding of gamma titanium aluminide alloy powder

Cited by 52 publications

References 10 publications

Metal injection moulding of titanium and titanium alloys: Challenges and recent development

Metal injection moulding of titanium and titanium alloys: Challenges and recent development

Fabrication of high porous NiTi shape memory alloy by metal injection molding

A Soft Molding Process for Fabrication of Micromachine Parts from Stainless Steel Powder

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