Microstructure and mechanical properties of TiAl-based composites prepared by Stereolithography and gelcasting technologies

Zhang, Lu; Cao, Junyi; Bai, Silin; Wang, M.Y.; Li, D.C.

doi:10.1016/j.jallcom.2015.01.191

Cited by 32 publications

(8 citation statements)

References 28 publications

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“…The heating rate during vacuum debinding (vacuity ~1 Pa) was 3°C/min between 25 and 220°C, 0.5°C/min between 220 and 400°C, and 1.5°C/min between 400 and 600°C. The vacuum debinding heating process was set according to the thermogravimetric curve of the binder, which was reported in one of our previous papers . After vacuum debinding, the temperature of the furnace was increased to 1100°C for the CVI process.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of high‐strength porous SiC‐based composites with unidirectional channels

et al. 2019

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Carbon fiber reinforced SiC-based composites with unidirectional channels were obtained by freeze-casting and chemical vapor infiltration techniques, and their microstructure and fracture behavior were investigated. The results indicated that the sizes of the unidirectional channels could be controlled in the 15-70 μm range. The significant pseudo plastic and ductility features of the porous SiC-based composite were demonstrated during the fracture process. The strains of the composites reached 4 ± 1% and 50 ± 6% during bending and compressive experiments, respectively. The bending and compressive strengths, 123 ± 20 and 99 ± 15 MPa, respectively, were far superior to those of homogeneous ceramics presenting the same porosity. Combining the aforesaid method with 3D printing techniques, a SiC-based composite part with controlled macro-micro channels was fabricated, which indicated that this method could be useful for fabricating ceramic parts with complex structure and superior mechanical performance. K E Y W O R D Scarbon fibers, freeze-casting, mechanical properties, SiC-based composite

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Section: Methodsmentioning

confidence: 99%

Fabrication of high‐strength porous SiC‐based composites with unidirectional channels

et al. 2019

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“…In the past few decades, a considerable amount of research has been done on the development of the ceramic gel casting technique. Along with the constant maturity of gel casting technology, the applications have been expanded to the domain of metal materials [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Study on the Fabrication of Porous TiAl Alloy via Non-Aqueous Gel Casting of a TiH2 and Al Powder Mixture

Zhang

Jiang

et al. 2019

Applied Sciences

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A porous TiAl alloy with 23.78% porosity was successfully fabricated via a low-toxicity, non-aqueous gel casting method by using a titanium hydride (TiH2) and aluminum (Al) powder mixture as the raw material. The effects of dispersant content and solid loading on the rheological properties of the TiH2/Al slurries were studied systematically. It was found that all the slurries exhibited a typical shear-thinning behavior, which is favorable for the gel casting process. Three-point bending tests of the dried TiH2/Al green bodies were carried out, and the results showed that the flexural strength was raised from 28.86 to 62.36 MPa with increasing monomer (hydroxyethyl methacrylate, HEMA) content. In order to study the degreasing process and minimize the possible residual carbon and oxygen after sintering, TGA analysis was performed. The fracture morphology of the sintered TiAl alloy (1400 °C for 2 h) was studied by scanning electron microscope (SEM). Based on the X-ray diffraction (XRD) identification, the main phases of the sintered part were γ-TiAl, α2-Ti3Al, and a small amount of Al2Ti and Al3Ti.

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“…Emerging 3D printing technology is capable of building net‐shape complex structures at a lower cost and enables fabricating structures with multifunctionality, which potentially opens new applications. Types of 3D printing techniques include fused deposition modeling, ink jet printing, stereolithography, and direct ink writing . Among these techniques, direct ink writing is widely used in various fields because of its simple setup and room temperature processing.…”

Section: Introductionmentioning

confidence: 99%

Direct Printing of Thermal Management Device Using Low‐Cost Composite Ink

Nguyen

Melamed

Park

et al. 2017

Macro Materials & Eng

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This work presents a new method for fabricating thermal devices, such as heat sinks, using a 3D printing technique and lightweight composite ink. The method focuses on formulating composite inks with desired properties and direct ink writing for manufacturing. The ink undergoes two phases: phase one uses low viscosity epoxy to provide viscoelastic properties and phase two provides the fillers consisting of carbon fiber and graphite nanoplatelets to provide high thermal conductivity and structural properties. By combining these functional materials, 3D structures with a high thermal conductivity (≈2 W m−1 K−1) are printed for thermal management applications with the storage modulus of 3000 MPa and a density only 1.24 g cm−3. The results show that by carefully tailoring functional properties of the ink, net‐shape multifunctional structures can be directly printed for thermal management device applications, such as heat sinks.

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Microstructure and mechanical properties of TiAl-based composites prepared by Stereolithography and gelcasting technologies

Cited by 32 publications

References 28 publications

Fabrication of high‐strength porous SiC‐based composites with unidirectional channels

Fabrication of high‐strength porous SiC‐based composites with unidirectional channels

Study on the Fabrication of Porous TiAl Alloy via Non-Aqueous Gel Casting of a TiH2 and Al Powder Mixture

Direct Printing of Thermal Management Device Using Low‐Cost Composite Ink

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