Microstructure evolution and mechanical properties of B4C/6061Al neutron absorber composite sheets fabricated by powder metallurgy

Chen, H.S.; Wang, W.X.; Nie, Hongqi; Zhou, Jun; Li, Yuli; Liu, R.F.; Zhang, Y.Y.; Zhang, P.

doi:10.1016/j.jallcom.2017.09.312

Cited by 71 publications

(11 citation statements)

References 21 publications

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“…Figure shows EBSD maps distinguished recrystallized, substructured, and deformed region of ITO ceramics: (A) S‐1# and (B) S‐2#. Recrystallization took place in ITO ceramics during the sintering . As shown in Figure A,B and C, the number of recrystallized grains increases with increasing the heating rate, following by the decrease of the number of substructured and deformed grains.…”

Section: Resultsmentioning

confidence: 88%

Microstructure, grain orientation, and properties of ITO ceramics sintered with various heating rates

Mei

Qin

Mei³

et al. 2018

Int J Applied Ceramic Tech

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In this study, the microstructure, grain orientation, electrical resistivity, nanohardness, and fracture strength were systematically investigated in ITO ceramics sintered with different heating rates. It was found that ITO ceramics sintered at 1600°C consist of main phase (In 2 O 3 ) and secondary phase (In 2 SnO 5 ) and the distributions of coarse grains with high indium content and fine grains with high tin content are interval. The higher heating rate was found to refine the grain size and increase the {1000} textured secondary phase. The increase in electrical resistivity of ITO ceramics was due to the decrease in oxygen vacancies caused by the reducing oxide decomposition. Moreover, the nanohardness of fine grains was found to be higher than that of coarse grains due to the reinforcement effect of Sn element. Besides, the increase of heating rate is beneficial to enhance the fracture strength due to the higher resistance of grain boundary to fracture propagation and the predominantly intergranular fracture. K E Y W O R D Selectrical resistivity, fracture strength, grain orientation, In 2 SnO 5 , nanohardness

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Section: Resultsmentioning

confidence: 88%

Microstructure, grain orientation, and properties of ITO ceramics sintered with various heating rates

Mei

Qin

Mei³

et al. 2018

Int J Applied Ceramic Tech

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“…Al2O3 and Al3BC, two secondary phases found away from the Al/B4C interface. AA6061/30 wt.% B4C neutron-absorbing composites were manufactured by Chen et al [4] using the powder metallurgy route. A reasonably homogeneous B4C particle distribution with B4C, Al and Al2O3 phases in the composite was reported.…”

Section: Effect Of B4c Reinforcement In Mono Amcsmentioning

confidence: 99%

“…Lightweight Al/B4C composites exhibited high hardness, low density, and excellent thermal and chemical stability, used in a bicycle frame, bulletproof vests, armor tanks, transportation, containment of nuclear waste, neutron absorber in nuclear power plant, etc. Lightweight AA6061/B4C composites are remarkably used in neutron shielding applications owned to its neutron absorbing characteristics and good strength [3,4]. Since the last few decades, investigators have shown their keen interest in the advanced properties of these materials for complex applications.…”

mentioning

confidence: 99%

Boron Carbide (B4C) Reinforced Aluminum Matrix Composites (AMCs)

Sharma¹,

Sharma²,

Upadhyay³

2019

IJITEE

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Aluminum matrix composites (AMCs) demonstrating a good combination of properties that are hard to acquire by a monolithic aluminum material. Since the last few decades, investigators have shown their keen interest to advance these materials for complex applications. Homogeneous reinforcement distribution, defect-free microstructure, and improved resultant properties depends on the fabrication method along with matrix and reinforcement materials and size. Two-step melt stirring technique and K2TiF6 flux enhanced the wettability and improve the particle distribution of boron carbide (B4C) in AMCs. The mechanical properties of the AMCs were enriched by either extrusion process or thermal treatment. Hybrid composites exhibited better characteristics than mono composites. Surface composites manufactured by incorporation of reinforcement in the surface layer; offer good surface properties without losing toughness and ductility. The B4C-Al interfacial reactions produce different precipitates in AMCs and damaged the composite's age-hardening ability. B4C reinforced friction stir processed surface composites exhibits refined structure and better properties compared to the aluminum matrix. The strength, hardness, and wear resistance of AMCs increased with rising fraction and reducing the size of B4C up to a certain level. Wear rate increases with rising applied load, sliding time and speed. A review of effect of B4C reinforcement on different properties of mono and hybrid AMCs with summarized results attained and concluded by different investigators is presented in this paper to help researchers in the field. At the end of this paper a position given to conclusions and future directions.

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“…Compared to other manufacturing techniques like ingot pressing and diffusion welding, powder metallurgy offer some advantages due to low manufacturing temperatures that diminishes the interfacial reactions between the matrix and reinforcement [9,14]. This can be achieved due to solid state diffusion of inter particle bonding, whereas the diffusion bonding plays a major role in controlling the microstructure and mechanical properties of the compact [15][16][17].…”

Section: Powder Metallurgymentioning

confidence: 99%

The effect of process parameters in Aluminum Metal Matrix Composites with Powder Metallurgy

Vani

Chak

2018

Manufacturing Rev.

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Metal Matrix Composites are developed in recent years as an alternative over conventional engineering materials due to their improved properties. Among all, Aluminium Matrix Composites (AMCs) are increasing their demand due to low density, high strength-to-weight ratio, high toughness, corrosion resistance, higher stiffness, improved wear resistance, increased creep resistance, low co-efficient of thermal expansion, improved high temperature properties. Major applications of these materials have been in aerospace, automobile, military. There are different processing techniques for the fabrication of AMCs. Powder metallurgy is a one of the most promising and versatile routes for fabrication of particle reinforced AMCs as compared to other manufacturing methods. This method ensures the good wettability between matrix and reinforcement, homogeneous microstructure of the fabricated MMC, and prevents the formation of any undesirable phases. This article addresses mainly on the effect of process parameters like sintering time, temperature and particle size on the microstructure of aluminum metal matrix composites.

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Microstructure evolution and mechanical properties of B4C/6061Al neutron absorber composite sheets fabricated by powder metallurgy

Cited by 71 publications

References 21 publications

Microstructure, grain orientation, and properties of ITO ceramics sintered with various heating rates

Microstructure, grain orientation, and properties of ITO ceramics sintered with various heating rates

Boron Carbide (B4C) Reinforced Aluminum Matrix Composites (AMCs)

The effect of process parameters in Aluminum Metal Matrix Composites with Powder Metallurgy

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