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新型硬質(zhì)Al-Si-B合金的制備及性能
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國(guó)家自然科學(xué)基金（51301139，10872172）；教育部博士點(diǎn)基金（20126102120058）


Preparation and Properties of Novel Hard Alloy Al-Si-B
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    摘要:

    采用B粉、Al粉、Mg粉和SiO2在高溫下反應(yīng)生成的含AlMgB14顆粒的混合體為前驅(qū)體，通過(guò)電子束加熱重熔的方法，制備出硬質(zhì)Al-Si-B合金，其平均硬度值達(dá)到33.8 GPa。利用X射線衍射儀（XRD）、掃描電子顯微鏡（SEM）、能譜（EDS）以及自制的微小平面摩擦系數(shù)測(cè)試平臺(tái)等手段對(duì)該合金及其前驅(qū)體的形貌、組成結(jié)構(gòu)與性能進(jìn)行的分析表明，經(jīng)電子束重熔得到的Al-Si-B合金為非晶態(tài)，其電阻率為6.8×10-5 Ω·cm，摩擦系數(shù)為0.06，表現(xiàn)出低摩擦系數(shù)、良好導(dǎo)電性和優(yōu)異化學(xué)惰性等特點(diǎn)。

    Abstract:

    In this paper, the hard alloy Al-Si-B has been prepared through melting the precursor, which is obtained by sintering the powders of B, Al, Mg and SiO2 by electron beam. The structure and properties of the final obtained alloy has been studied by X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The results reveal that the alloy is amorphous. Nano indentor test shows that the average hardness of this alloy is 33.8 GPa. The electrical resistivity measured with a four probe instrument of the alloy is 6.8×10-5 Ω·cm showing a excellent electrical conductivity. Relative friction test shows that this boride has a extremely low friction coefficient of 0.06.

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王 泉,耿興國(guó),臧渡洋,郎莎莎.新型硬質(zhì)Al-Si-B合金的制備及性能[J].稀有金屬材料與工程,2015,44(7):1800~1804.[Wang Quan, Geng Xingguo, Zang Duyang, Lang Shasha. Preparation and Properties of Novel Hard Alloy Al-Si-B[J]. Rare Metal Materials and Engineering,2015,44(7):1800~1804.]
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  • 收稿日期:2014-07-20
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  • 在線發(fā)布日期: 2016-01-04
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