2019年1月1日 · The effects on the particle size of boron carbide (B4C) reinforcement on morphology evolution and microstructure are thoroughly studied. The strengthening mechanisms of B4C reinforced Al-MMC are thoroughly reviewed and the interfacial structure in between B4C and matrix material are discussed. © 2019 Elsevier Ltd. All rights reserved.

2021年1月1日 · Fig. 4 shows the SEM images of raw aluminium particles and Nano B 4 C particles used. It is observed that 15% volume fraction of Nano B 4 C shows optimum results with increase in hardness from 33HV to 164HV along with compressive strength from 130 MPa to …

2021年8月1日 · SEM images of synthesized powders: (a) B 4 C and (a) SiC. FTIR-ATR spectra of B 4 C and SiC were illustrated in Fig. 3 . For B 4 C, the peak at 1116 cm -1 can be attributed to icosahedral boron carbide vibration.

2024年1月18日 · The phase composition, microstructure, and microhardness of the B4C/aluminum matrix composites (B4C/AMCs) were analyzed by OM, XRD, SEM, TEM, EBSD, microhardness test and molecular dynamics simulation (MD) in detail. The results show that acicular microstructure of AlB12 and Al4C3 are formed in the B4C/AMCs fabricated by DLD.

2023年8月12日 · Uniform distribution of reinforcement and phase analysis has been shown by scanning electron microscopy (SEM) and XRD analysis. The formation of intermetallic compounds like Al 3 BC and Al 4 C 3,...

2024年2月29日 · Al2O3-B4C composites with 5, 10, 15, 50 vol% B4C additions were consolidated by hot pressing. The effect of the B4C additive on compaction behavior, microstructure and mechanical properties of the composites was investigated. Detailed SEM-EDS and XRD studies revealed differences in microstructure upon addition of B4C.

2017年4月18日 · 扫描电子显微镜（SEM）观察表明，大块复合材料中B 4 C含量越高，B 4 C粒径越细。 透射电子显微镜（TEM）观察表明，由于Al基体和B之间的热膨胀系数（CTE）差异很大，因此B 4 C颗粒周围的Al基体的晶粒尺寸比其他区域小得多。 4 C颗粒。 室温压缩试验表明，随着B 4的增加C含量，块状样品的抗压强度首先增加然后降低。 基于观察到的微观结构，讨论了机械性能的重大变化。 在这项研究中，通过机械研磨和随后的热固结来制备具有各种B 4 C含量 …

2022年5月31日 · 哈尔滨工业大学金属复合材料与工程研究所实现了对b4c粉末的表面改性，通过控制高温氧化过程的温度和时间使其表面形成b2o3相，可以有效的提高力学性能，但低温、氧化时间较短的条件下b4c粉末表面的b2o3相分布不均匀，而高温、长时氧化工艺又会造成成本高、粉末相互粘接不易打开的问题。 5.本发明是要解决现有b4c增强al基复合材料中b4c颗粒的尖角、b4c与金属al基体之间界面结合差、界面反应严重、界面处生成脆性金属间化合物等问题。 而提供一种 …

2021年3月29日 · In the current study, the effect of different B4C additions (0, 2.5, 5, and 10 wt%) on the microstructural, solidification behavior, mechanical, and tribological properties of Al-20%Mg2Si composite were studied by means of scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), Vickers ...

A novel B4C–SiC composite aerogel is synthesized using nano boron carbide suspension, 3-aminopropyltriethoxysilane (APTES), and resorcinol–formaldehyde (RF) as precursors through the sol–gel ...