scholarly journals Microstructural Evolution and Mechanical Properties of Graphene Oxide-Reinforced Ti6Al4V Matrix Composite Fabricated Using Spark Plasma Sintering

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1440
Author(s):  
Ying Song ◽  
Weiwei Liu ◽  
Yufeng Sun ◽  
Shaokang Guan ◽  
Yao Chen
Keyword(s):  
Graphene Oxide ◽  
Spark Plasma Sintering ◽  
Load Transfer ◽  
Interfacial Bonding ◽  
Residual Tensile Stress ◽  
Weave Structure ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Increasing Demand ◽  
In Virtue Of

To achieve a further reduction in weight of titanium alloys and to satisfy the increasing demand of energy-saving for aerospace and automotive applications, a graphene oxide nanosheet-reinforced Ti6Al4V (GO/TC4) composite was successfully fabricated using spark plasma sintering (SPS). Contrary to the Widmanstätten microstructure of a monolithic TC4 sample, the microstructure of the composites displayed a typical basket-weave structure in virtue of the introduced residual tensile stress generated from the mismatch of coefficients of thermal expansion (CTE) between GO and TC4 during the phase transformation. Meanwhile, the in situ-formed TiC nanolayer and diffusion layer were identified at the GO–TC4 interface, which is expected to endow a stronger interfacial bonding. As compared with the TC4 sample, the TC4 composite with the addition of 0.27 wt.% GO exhibited a 0.2% yield strength of 921.8 MPa, an ultimate tensile strength of 1040.1 MPa, and an elongation of 5.3%, displaying a better balance of strength and ductility than that of the composite with a higher GO addition (0.54 wt.%). The synergetic strengthening mechanisms such as Orowan strengthening, enhanced dislocation density strengthening, and load transfer were confirmed. Among them, load transfer contributed greatly to the strength of the composites due to improved interfacial bonding between the GO fillers and TC4 matrix.

scholarly journals Microstructure evolution of TC4 powder by spark plasma sintering after hot deformation

2020 ◽  
Vol 39 (1) ◽  
pp. 457-465
Author(s):  
Jiangpeng Yan ◽  
Zhimin Zhang ◽  
Jian Xu ◽  
Yaojin Wu ◽  
Xi Zhao ◽  
...  
Keyword(s):  
Strain Rate ◽  
Relative Density ◽  
Spark Plasma Sintering ◽  
Hot Deformation ◽  
Tc4 Titanium Alloy ◽  
Weave Structure ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Average Relative Density ◽  
Low Strain Rate

AbstractThe cylindrical samples of TC4 titanium alloy prepared by spark plasma sintering (SPS) were compressed with hot deformation of 70% on the thermosimulation machine of Gleeble-1500. The temperature of the processes ranged from 850°C to 1,050°C, and the strain rates varied between 0.001 and 5 s−1. The relative density of the sintered and compressed samples was measured by the Archimedes principle. During hot deformation, the microstructure of the sample was observed. The results show that the average relative density of the samples was 90.2% after SPS. And the relative density was about 98% after the hot deformation of 70%. Under high temperature (>950°C), the sensitivity of flow stress to temperature was reduced. At low strain rate (0.001 s−1), the increase in the deformation temperature promoted the growth of dynamic recrystallization (DRX). At the same temperature, the increase in strain rate slowed down the growth of DRX grains. And the variation tendency was shown from the basket-weave structure to the Widmanstätten structure at a low strain rate (<0.1 s−1), with increase in the strain rate.

Facile synthesis and characterization of reduced graphene oxide/copper composites using freeze-drying and spark plasma sintering

2016 ◽  
Vol 166 ◽  
pp. 67-70 ◽  
Author(s):  
Xinjiang Zhang ◽  
Kaifeng Wu ◽  
Meng He ◽  
Zhiyong Ye ◽  
Shengyang Tang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Spark Plasma Sintering ◽  
Freeze Drying ◽  
Synthesis And Characterization ◽  
Facile Synthesis ◽  
Plasma Sintering ◽  
Reduced Graphene ◽  
Spark Plasma

In situ reduction of graphene oxide nanoplatelet during spark plasma sintering of a silica matrix composite

2014 ◽  
Vol 34 (14) ◽  
pp. 3357-3364 ◽  
Author(s):  
Harshit Porwal ◽  
Salvatore Grasso ◽  
Mahesh Kumar Mani ◽  
Mike J. Reece
Keyword(s):  
Graphene Oxide ◽  
Spark Plasma Sintering ◽  
Matrix Composite ◽  
Silica Matrix ◽  
In Situ Reduction ◽  
Plasma Sintering ◽  
Spark Plasma

Preparation of Ag/reduced graphene oxide reinforced copper matrix composites through spark plasma sintering: An investigation of microstructure and mechanical properties

2020 ◽  
Vol 46 (9) ◽  
pp. 13569-13579 ◽  
Author(s):  
Reza sayyad ◽  
Mohammad Ghambari ◽  
Touradj Ebadzadeh ◽  
Amir Hossein Pakseresht ◽  
Ehsan Ghasali
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Spark Plasma Sintering ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
Plasma Sintering ◽  
Reduced Graphene ◽  
Spark Plasma

Reduced-graphene-oxide-reinforced boron carbide ceramics fabricated by spark plasma sintering from powder mixtures obtained by heterogeneous co-precipitation

2019 ◽  
Vol 45 (13) ◽  
pp. 16496-16503 ◽  
Author(s):  
Ming Li ◽  
Weimin Wang ◽  
Qianglong He ◽  
Aiyang Wang ◽  
Lanxin Hu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Boron Carbide ◽  
Reduced Graphene Oxide ◽  
Spark Plasma Sintering ◽  
Powder Mixtures ◽  
Plasma Sintering ◽  
Reduced Graphene ◽  
Spark Plasma ◽  
Carbide Ceramics ◽  
Co Precipitation

Reinforcing 13–93 bioglass scaffolds fabricated by robocasting and pressureless spark plasma sintering with graphene oxide.

2019 ◽  
Vol 97 ◽  
pp. 108-116 ◽  
Author(s):  
Azadeh Motealleh ◽  
Siamak Eqtesadi ◽  
Fidel H. Perera ◽  
Angel L. Ortiz ◽  
Pedro Miranda ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma

Thermal conductivity and microstructure of Al/diamond composites with Ti-coated diamond particles consolidated by spark plasma sintering

2011 ◽  
Vol 46 (9) ◽  
pp. 1127-1136 ◽  
Author(s):  
Xuebing Liang ◽  
Chengchang Jia ◽  
Ke Chu ◽  
Hui Chen ◽  
Junhui Nie ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Spark Plasma Sintering ◽  
Volume Fraction ◽  
Theoretical Calculations ◽  
Interfacial Bonding ◽  
Titanium Coating ◽  
Diamond Particles ◽  
Plasma Sintering ◽  
The Matrix ◽  
Spark Plasma

Metal/diamond composites have been considered as the new generation of thermal management material. The critical challenge to obtain composites with high thermal conductivity (TC) is to improve the interfacial bonding between the matrix and diamond. In the present study, a titanium coating was plated on the surface of diamond particles via vacuum evaporation–deposition, and Al/diamond composites were consolidated by spark plasma sintering (SPS) technique. The TC and microstructure of composites, respectively, with coated and uncoated diamond particles are compared and discussed. The results show that the Ti coating can significantly increase the wetting property between Al and diamond, leading to a strong interfacial bonding. The diffusion of Ti into the matrix and the formation of TiC are detected at the Al–diamond interface. The properties of composites, respectively, with coated and uncoated diamond exhibit different trends with increasing sintering temperature or diamond volume fraction. Compared with composites with uncoated particles, the Al/Ti–diamond composites obtained the much higher relative density and TC as high as 491 W/mK. Based on the comparison between the experimental and theoretical values, it is found that the thermal conductivities of Al/Ti–diamond composites have reached or surpassed the theoretical calculations with the particle volume fraction not more than 50%.

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