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一種由MCNP設(shè)計(jì),通過(guò)SPS加熱軋制備的新型輻射屏蔽復(fù)合材料
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材料科學(xué)與工程學(xué)院

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國(guó)家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目，重點(diǎn)項(xiàng)目，重大項(xiàng)目）


A newly designed radiation shielding composite by MCNP and fabricated by SPS followed by hot-rolling
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1.College of Materials Science and Engineering;2.College of Materials Science and Engineering,Taiyuan University of Technology,Shanxi Taiyuan

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    摘要:

    本研究旨在設(shè)計(jì)和制備一種新型的中子和γ射線輻射屏蔽復(fù)合材料?；诿商乜_模擬,含不同W質(zhì)量分?jǐn)?shù)(40~70%)的新型(W+B)/6061Al復(fù)合材料首次采用球磨法和SPS加熱軋制法制備,并對(duì)其組織和力學(xué)性能進(jìn)行了研究。實(shí)驗(yàn)結(jié)果顯示,軋制之后,W和B顆粒均勻分布于基體中,而且W/Al界面以固溶體的形式呈現(xiàn)出良好的冶金結(jié)合。復(fù)合材料的物相主要包括W和Al。EBSD結(jié)果表明,W顆粒具有促進(jìn)動(dòng)態(tài)再結(jié)晶(DRX)成核、限制晶粒長(zhǎng)大和降低6061Al基體織構(gòu)的作用。拉伸試驗(yàn)表明,W含量為50 wt.%的復(fù)合材料強(qiáng)度最高,塑性較好。結(jié)合模擬結(jié)果,該組分的復(fù)合材料性能達(dá)到了實(shí)際應(yīng)用要求。(W+B)/6061Al復(fù)合材料的強(qiáng)化機(jī)理包括位錯(cuò)強(qiáng)化和載荷傳遞效應(yīng)。

    Abstract:

    This study aims to design and fabricate a new kind of radiation shielding composite against both neutron and gamma rays. Based on Monte Carlo simulations, novel (W+B)/6061Al composite sheets with different W mass fractions (40-70%) were first fabricated by ball-milling and SPS followed by hot-rolling, then the microstructure and mechanical properties were investigated. Results show that after rolling process, W and B particles uniformly distributed in the matrix and the interface of W-Al exhibited good metallurgical bonding containing solid solution. The composites were mainly consisted of W and Al phases. EBSD results show that W particles had the effects of promoting dynamic recrystallization (DRX) nucleation, confining the grain growth and reducing the texture of 6061Al matrix. Through tensile tests, the composite with 50 wt.% W shows the highest strength and better plasticity. Together with the simulation results, composite of this composition is believed to meet the demand of practical applications. The strengthening mechanisms of (W+B)/6061Al composites include dislocation strengthening and load transfer effect.

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張宇陽(yáng),王文先,陳洪勝,劉瑞峰,張媛琦,石寧.一種由MCNP設(shè)計(jì),通過(guò)SPS加熱軋制備的新型輻射屏蔽復(fù)合材料[J].稀有金屬材料與工程,2020,49(3):787~796.[Zhang Yuyang, Wang Wenxian, Chen Hongsheng, Liu Ruifeng, Zhang Yuanqi, Shi Ning. A newly designed radiation shielding composite by MCNP and fabricated by SPS followed by hot-rolling[J]. Rare Metal Materials and Engineering,2020,49(3):787~796.]
DOI：10.12442/j. issn.1002-185X.20181039

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  • 收稿日期:2018-10-14
  • 最后修改日期:2018-12-20
  • 錄用日期:2019-01-10
  • 在線發(fā)布日期: 2020-04-08
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