Mechanical Properties of a Titanium Matrix Composite Reinforced with Low Cost Carbon Black via Powder Metallurgy Processing

Titanium and its alloys have been employed in the biomedical industry as implants and show promise for more broad applications because of their excellent mechanical properties and low density. However, high cost, poor wear properties, low hardness and associated side effects caused by leaching of alloy elements in some titanium alloys has been the bottleneck to their wide application. TiB reinforcement has shown promise as both a surface coating for Ti implants and also as a composite reinforcement phase. In this study, a low-cost TiB-reinforced alpha titanium matrix composite (TMC) is developed. The composite microstructure includes ultrahigh aspect ratio TiB nanowhiskers with a length up to 23 μm and aspect ratio of 400 and a low average Ti grain size. TiB nanowhiskers are formed in situ by the reaction between Ti and BN nanopowder. The TMC exhibited hardness of above 10.4 GPa, elastic modulus above 165 GPa and hardness to Young’s modulus ratio of 0.062 representing 304%, 170% and 180% increases in hardness, modulus and hardness to modulus ratio, respectively, when compared to commercially pure titanium. The TiB nanowhisker-reinforced TMC has good biocompatibility and shows excellent mechanical properties for biomedical implant applications.

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Characteristics of powder metallurgy pure titanium matrix composite reinforced with multi-wall carbon nanotubes

Composites Science and Technology ◽

10.1016/j.compscitech.2009.01.026 ◽

2009 ◽

Vol 69 (7-8) ◽

pp. 1077-1081 ◽

Cited By ~ 144

Author(s):

Katsuyoshi Kondoh ◽

Thotsaphon Threrujirapapong ◽

Hisashi Imai ◽

Junko Umeda ◽

Bunshi Fugetsu

Keyword(s):

Carbon Nanotubes ◽

Powder Metallurgy ◽

Matrix Composite ◽

Pure Titanium ◽

Titanium Matrix ◽

Titanium Matrix Composite ◽

Multi Wall Carbon Nanotubes

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Effect of Graphene Nanosheets Content on Microstructure and Mechanical Properties of Titanium Matrix Composite Produced by Cold Pressing and Sintering

Nanomaterials ◽

10.3390/nano8121024 ◽

2018 ◽

Vol 8 (12) ◽

pp. 1024 ◽

Cited By ~ 7

Author(s):

Milad Haghighi ◽

Mohammad Shaeri ◽

Arman Sedghi ◽

Faramarz Djavanroodi

Keyword(s):

Mechanical Properties ◽

Matrix Composite ◽

Volume Fraction ◽

Graphene Nanosheets ◽

Microstructural Analysis ◽

Titanium Matrix ◽

Titanium Matrix Composite ◽

Cold Pressing ◽

Sintering Time ◽

Microstructure And Mechanical Properties

The effect of graphene nanosheet (GNS) reinforcement on the microstructure and mechanical properties of the titanium matrix composite has been discussed. For this purpose, composites with various GNS contents were prepared by cold pressing and sintering at various time periods. Density calculation by Archimedes’ principle revealed that Ti/GNSs composites with reasonable high density (more than 99.5% of theoretical density) were produced after sintering for 5 h. Microstructural analysis by X-ray diffraction (XRD) and a field emission scanning electron microscope (FESEM) showed that TiC particles were formed in the matrix during the sintering process as a result of a titanium reaction with carbon. Higher GNS content as well as sintering time resulted in an increase in TiC particle size and volume fraction. Microhardness and shear punch tests demonstrated considerable improvement of the specimens’ mechanical properties with the increment of sintering time and GNS content up to 1 wt. %. The microhardness and shear strength of 1 wt. % GNS composites were enhanced from 316 HV and 610 MPa to 613 HV and 754 MPa, respectively, when composites sintered for 5 h. It is worth mentioning that the formation of the agglomerates of unreacted GNSs in 1.5 wt. % GNS composites resulted in a dramatic decrease in mechanical properties.

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319 Development of low cost manufacturing process for Titanium matrix composite blade

The Proceedings of the Materials and processing conference ◽

10.1299/jsmemp.2000.8.125 ◽

2000 ◽

Vol 2000.8 (0) ◽

pp. 125-126

Author(s):

Takeshi YAMADA ◽

Takayuki TSUZUKU ◽

Masashi HIROTA ◽

Yukio KAWACHI ◽

Shinichi YAMAMOTO

Keyword(s):

Matrix Composite ◽

Manufacturing Process ◽

Low Cost ◽

Titanium Matrix ◽

Titanium Matrix Composite ◽

Composite Blade ◽

Low Cost Manufacturing

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Effect of Processing Route on Microstructure and Mechanical Properties of a Ti-3Al-2.5V/TiB Composite

Materials Science Forum ◽

10.4028/www.scientific.net/msf.941.1950 ◽

2018 ◽

Vol 941 ◽

pp. 1950-1955

Author(s):

Ludovic Ropars ◽

Moukrane Dehmas ◽

Elisabeth Aeby-Gautier ◽

David Tricker ◽

Dominique Schuster ◽

...

Keyword(s):

Mechanical Properties ◽

Powder Metallurgy ◽

Matrix Composite ◽

Hot Isostatic Pressing ◽

Processing Route ◽

Titanium Matrix ◽

Composite Powders ◽

The Matrix ◽

Application Potential ◽

Powder Metallurgy Route

A Ti-3Al-2.5V matrix composite reinforced with 8.5 vol.% TiB was produced using a powder metallurgy route. Processing included the mechanical alloying of Ti-3Al-2.5V and TiB2 powders and Hot Isostatic Pressing (HIP) of the resultant composite powders, to produce a dense billet. These billets were subsequently extruded and/or subjected to various Conversion Heat Treatments (CHT), to complete the transformation of the TiB2 particles into TiB needles. The CHT was performed either before or after extrusion. Microstructures and tensile properties of the materials at each stage of the processing routes were investigated and compared to those of a non-reinforced Ti-3Al-2.5V material, manufactured by the same powder metallurgy route. It has been demonstrated that the processing routes have a great impact on the mechanical properties, through modifications of the matrix and reinforcement characteristics. Well-chosen processing routes lead to more ductile composites, though this gain in ductility leads to slightly lower stiffness and strength values. This study clearly demonstrates the possibility to produce, at an industrial scale, a ductile version of a highly reinforced titanium matrix composite, showing important application potential.

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