Fabrication and mechanical properties of CNTs/Mg composites prepared by combining friction stir processing and ultrasonic assisted extrusion

Ji, Liang; Li, Hejun; Qi, Lehua; Tian, Wenlong; Li, Xuefeng; Chao, Xujiang; Wei, Jianfeng

doi:10.1016/j.jallcom.2017.09.009

Cited by 90 publications

(17 citation statements)

References 35 publications

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“…An effective load transfer capacity and inhibition of dislocation motion by the interfaces reported on a composite of nano-sized carbonaceous particles and AZ91 Mg alloy [35]. A similar mechanism was also observed on a composite of carbon nanotube (CNT) and AZ91D alloy where CNT was responsible for the dislocation strengthening and stress transfer mechanism [36]. Those two mechanisms should also be applicable to the present CNF/Mg-Zn composites and become the reason for the increase of the elastic modulus and hardness by almost 65% and 24%, respectively.…”

Section: Analysis Of Mechanical Propertiessupporting

confidence: 54%

Optimum Processing of Absorbable Carbon Nanofiber Reinforced Mg–Zn Composites Based on Two-Level Factorial Design

Tuminoh

Hermawan

Ramlee

2021

Metals

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To prevent a premature failure, absorbable magnesium implants must possess an adequate mechanical stability. Among many ways to improve the mechanical properties of magnesium is by particle reinforcement, such as using carbon nanofiber (CNF). This work reports an experimental design for optimum materials and processing of CNF-reinforced Mg–Zn composites based on a two-level factorial design. Four factors were analyzed: percentage of CNF, compaction pressure, sintering temperature, and sintering time, for three recorded responses: elastic modulus, hardness, and weight loss. Based on the two-level factorial design, mechanical properties and degradation resistance of the composites reach its optimum at a composition of 2 wt % CNF, 400 MPa of compaction pressure, and 500 °C of sintering temperature. The analysis of variance reveals a significant effect of all variables (p < 0.0500) except for the sintering time (p > 0.0500). The elastic modulus and hardness reach their highest values at 4685 MPa and 60 Hv, respectively. The minimum and maximum weight loss after three days of immersion in PBS are recorded at 54% and 100%, respectively. This work concludes the percentage of CNF, compaction pressure, and sintering temperature as the main factors affecting the optimum elastic modulus, hardness, and degradation resistance of CNF-reinforced Mg–Zn composites.

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Section: Analysis Of Mechanical Propertiessupporting

confidence: 54%

Optimum Processing of Absorbable Carbon Nanofiber Reinforced Mg–Zn Composites Based on Two-Level Factorial Design

Tuminoh

Hermawan

Ramlee

2021

Metals

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“…Nevertheless, such an enhancement effect was impaired in Zn-0.3RGO. Usually, there was a critical value of nano reinforcement in composites for the strengthening effect [ 55 , 56 ]. As the quantity of nano reinforcement below the critical value, they homogeneously distributed in the matrix, and effectively enhanced the matrix strength.…”

Section: Resultsmentioning

confidence: 99%

Microstructure evolution and texture tailoring of reduced graphene oxide reinforced Zn scaffold

Yang

Cheng

Peng

et al. 2021

Bioactive Materials

148

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Zinc (Zn) possesses desirable degradability and favorable biocompatibility, thus being recognized as a promising bone implant material. Nevertheless, the insufficient mechanical performance limits its further clinical application. In this study, reduced graphene oxide (RGO) was used as reinforcement in Zn scaffold fabricated via laser additive manufacturing. Results showed that the homogeneously dispersed RGO simultaneously enhanced the strength and ductility of Zn scaffold. On one hand, the enhanced strength was ascribed to (i) the grain refinement caused by the pinning effect of RGO, (ii) the efficient load shift due to the huge specific surface area of RGO and the favorable interface bonding between RGO and Zn matrix, and (iii) the Orowan strengthening by the homogeneously distributed RGO. On the other hand, the improved ductility was owing to the RGO-induced random orientation of grain with texture index reducing from 20.5 to 7.3, which activated more slip systems and provided more space to accommodate dislocation. Furthermore, the cell test confirmed that RGO promoted cell growth and differentiation. This study demonstrated the great potential of RGO in tailoring the mechanical performance and cell behavior of Zn scaffold for bone repair.

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“…Among these techniques for fabrication of Mg-based composites, FSP has attracted extensive attention, which could fabricate Mg-based composites efficiently due to frictional heating and severe plastic deformation (Del Valle et al, 2015;Liang et al, 2017). At the same time, FSP could refine the grain size, homogenize the microstructure, and improve the dispersion of reinforcements (Chen et al, 2015;Arab and Marashi, 2019;Zhang and Chen, 2019).…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of AZ31/ZrO2 Composites Prepared by Friction Stir Processing With High Rotation Speed

Zang

Chen

et al. 2020

Front. Mater.

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The nano-ZrO 2-reinforced AZ31 alloy composites were fabricated by friction stir processing with three multi-passes and high rotation speeds. The AZ31/2.14 vol% ZrO 2 , AZ31/4.29 vol% ZrO 2, and AZ31/6.43 vol% ZrO 2 composites were designed. The fine microstructure and uniform dispersion of ZrO 2 particles were observed in the AZ31/ZrO 2 composites. The excellent interfacial bonding was observed between the Mg matrix and ZrO 2. The hardness and tensile properties were enhanced after three cumulative friction stir processing passes. This was attributed to grain refinement and strengthening effects of ZrO 2. The tensile properties and hardness of the AZ31/ZrO 2 composite increased with the increase of volume fraction of the ZrO 2 particles from 2.14 to 6.43 vol%.

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Fabrication and mechanical properties of CNTs/Mg composites prepared by combining friction stir processing and ultrasonic assisted extrusion

Cited by 90 publications

References 35 publications

Optimum Processing of Absorbable Carbon Nanofiber Reinforced Mg–Zn Composites Based on Two-Level Factorial Design

Optimum Processing of Absorbable Carbon Nanofiber Reinforced Mg–Zn Composites Based on Two-Level Factorial Design

Microstructure evolution and texture tailoring of reduced graphene oxide reinforced Zn scaffold

Microstructure and Mechanical Properties of AZ31/ZrO2 Composites Prepared by Friction Stir Processing With High Rotation Speed

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