Microstructure and properties of B<sub>4</sub>C<sub>p</sub>/Al composite prepared by microwave sintering with low temperature

Wang, Hongming; Tang, Feng; Li, Gui-Rong; De, Zhang; Liu, Ming; Kai, Xizhou

doi:10.1088/2053-1591/ab96ff

Cited by 13 publications

(2 citation statements)

References 29 publications

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“…This phenomenon has also been reported in the sintering process of other composites. Wang and Gürbüz et al [21,22] observed in B 4 C/Al and Graphene/Al composites that in an appropriate temperature range, increasing the sintering temperature and prolonging the sintering time, respectively, will significantly increase the density of the composite, thereby improving the performance. However, excessively increasing the sintering temperature leads to a significant decrease in material properties.…”

Section: Resultsmentioning

confidence: 99%

Spark Plasma Sintering of AlN/Al Functionally Graded Materials

Xiu

Liu

et al. 2021

Materials

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In this paper, six-layer AlN/Al gradient composites were prepared by a spark plasma sintering process to study the influences of sintering temperature and holding time on the microstructure and mechanical properties. The well-bonded interface enables the composite to exhibit excellent thermal and mechanical properties. The hardness and thermal expansion properties of the composite exhibit a gradient property. The hardness increased with the volume fraction of AlN while the CTE decreased as the volume fraction of AlN. The thermal expansion reaches the lowest value of 13–14 ppm/K, and the hardness reaches the maximum value of 1.25 GPa, when the target volume fraction of AlN is 45%. The simulation results show that this gradient material can effectively reduce the thermal stress caused by the mismatch of the thermal expansion coefficient as a transmitter and receiver (T/R) module. This paper attempts to provide experimental support for the preparation of gradient Al matrix composites.

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Section: Resultsmentioning

confidence: 99%

Spark Plasma Sintering of AlN/Al Functionally Graded Materials

Xiu

Liu

et al. 2021

Materials

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“…Being a new powder metallurgy method, microwave sintering (MWS) can effectively avoid composition segregation, reduce interfacial reactions, promote the uniform distribution of reinforcements, refine grains, and improve solid solubility [4]. Microwave sintering has become the main method to prepare high-performance aluminum alloys [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Erbium Micro-Additions on Microstructures and Properties of 2024 Aluminum Alloy Prepared by Microwave Sintering

Qin,

Fan,

et al. 2024

Crystals

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The effects of rare earth erbium (Er) micro-additions on the microstructures and mechanical properties of 2024 aluminum alloy were investigated. The microstructures and fracture surfaces of specimens prepared via high-energy ball milling, cold isostatic pressing and microwave sintering were carried out by optical microscopy (OM) and scanning electron microscopy (SEM). Under the conditions of sintering heating rate of 20 min/°C and soaking time of 30 min at 490 °C, it was found that with the increase in Er addition, the grain size first decreased then increased, and it reached a minimum size of about 5 μm when the Er content was 0.6%, showing that the grains were refined. At the same time, the compactness and microhardness reached maximum levels, which were 97.6% and 94.5 HV, respectively. Moreover, the tensile strength and elongation reached the peak at 160.5 MPa and 4.4%, respectively. The dynamic mechanical response of Er/2024Al alloy with different Er content was studied through a split Hopkinson pressure bar (SHPB) at strain rates of 600 s−1 and 800 s−1, respectively. Both at the strain rates of 600 s−1 and 800 s−1, the dynamic yield stress of the specimens increased gradually with an increase in Er content. For the 0.6 wt.% Er specimen, the dynamic yield stress reached 371.3 MPa at a strain rate of 800 s−1, which was 28.2% higher than that at a strain rate of 600 s−1. When the strain rate is 800 s−1, the deformation degree of the 0.6 wt.%Er specimen is 55.3%, which is 14.7% higher than for the Er-free one, and there are adiabatic shear bands formed in the 0.6 wt.%Er specimen. Through a fracture analysis of the samples, a certain number of dimples appeared in the fracture of an impact specimen, indicating that the addition of Er improved the toughness of the material. This research can provide a reference for the development and application of high-performance aluminum alloy in automotive structural materials.

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Microstructure Evolution of B4C/Al Interface: A First-Principle Study

Mei

Yang

et al. 2021

J. of Materi Eng and Perform

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Microstructure and properties of B₄C_p/Al composite prepared by microwave sintering with low temperature

Cited by 13 publications

References 29 publications

Spark Plasma Sintering of AlN/Al Functionally Graded Materials

Spark Plasma Sintering of AlN/Al Functionally Graded Materials

Effect of Erbium Micro-Additions on Microstructures and Properties of 2024 Aluminum Alloy Prepared by Microwave Sintering

Microstructure Evolution of B4C/Al Interface: A First-Principle Study

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Microstructure and properties of B4Cp/Al composite prepared by microwave sintering with low temperature

Cited by 13 publications

References 29 publications

Spark Plasma Sintering of AlN/Al Functionally Graded Materials

Spark Plasma Sintering of AlN/Al Functionally Graded Materials

Effect of Erbium Micro-Additions on Microstructures and Properties of 2024 Aluminum Alloy Prepared by Microwave Sintering

Microstructure Evolution of B4C/Al Interface: A First-Principle Study

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Microstructure and properties of B₄C_p/Al composite prepared by microwave sintering with low temperature