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Spark plasma sintering of an Al-based powder blend

机译：铝基粉末共混物的火花等离子体烧结

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摘要

The present study investigates the sintering response of a hypereutectic aluminum-silicon alloy, specifically Alumix-231 (Al-14Si-2.5Cu-0.5Mg), using Spark Plasma Sintering (SPS). The focus was to link the influence of the sintering parameters to the sintered density, microstructure, hardness and flexural properties in T1 and T6 conditions. The results were compared to those obtained using the conventional press and sinter route, a method typically used for this alloy. The samples consolidated using SPS attained densities between 95% and 100%TD compared to those obtained by conventional sintering which were approximately 94%TD. Before and after the aging heat treatment, microhardness and mechanical properties were assessed for both SPS and press-sinter samples. After sintering, in the T1 condition, a hardness of 89 ± 7 HV, a flexural strength of 702 ± 28 MPa and a flexural strain of 6.2 ± 6 1.2% were obtained for the SPS samples. In the T6 condition, a hardness of 157 ± 5 HV, a flexural strength of 654 ± 38 MPa and a flexural strain of 4.4 ± 0.2% were obtained in the ideal SPS conditions. On the other hand, a hardness of 137 ± 8 HV, a flexural strength of 315 ± 69 MPa, and a flexural strain of 3.4 ± 0.1% were achieved for the conventional sintering process after the T6 heat treatment. The hardness in the T1 condition was lower than what had been reported in the literature, however after a T6 heat treatment, hardness values obtained in this study were similar to previous work. On the other hand, the difference in flexural properties was unlike previous studies.
机译：本研究使用火花等离子体烧结（SPS）研究了一种过共晶铝硅合金，特别是Alumix-231（Al-14Si-2.5Cu-0.5Mg）的烧结响应。重点是将烧结参数的影响与T1和T6条件下的烧结密度，微观结构，硬度和弯曲性能联系起来。将结果与使用常规压制和烧结方法（通常用于该合金的方法）获得的结果进行比较。与通过常规烧结获得的大约94％TD的密度相比，使用SPS固结的样品的密度在95％到100％TD之间。在时效热处理前后，均对SPS和冲压烧结样品的显微硬度和力学性能进行了评估。烧结后，在T1条件下，SPS样品的硬度为89±7 HV，弯曲强度为702±28 MPa，弯曲应变为6.2±6 1.2％。在理想的SPS条件下，在T6条件下，硬度为157±5 HV，弯曲强度为654±38 MPa，弯曲应变为4.4±0.2％。另一方面，在T6热处理之后的常规烧结工艺中，获得了137±8 HV的硬度，315±69 MPa的弯曲强度和3.4±0.1％的弯曲应变。 T1条件下的硬度低于文献报道的硬度，但是经过T6热处理后，在这项研究中获得的硬度值与以前的工作相似。另一方面，挠曲特性的差异不同于先前的研究。

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  • 来源
    《Materials Science and Engineering》 |2015年第5期|18-27|共10页
  • 作者

    S. Rudinsky; J.M. Aguirre; G. Sweet; J. Milligan; D.P. Bishop; M. Brochu;

  • 作者单位

    Department of Mining and Materials Engineering, McCill University, 3610 University Street, Montreal, QC, Canada H3A 0C5;

    Department of Mining and Materials Engineering, McCill University, 3610 University Street, Montreal, QC, Canada H3A 0C5;

    Department of Process Engineering and Applied Science, Dalhousie University, 1360 Barrington Street, Halifax, NS, Canada B3J 1Z1;

    Department of Mining and Materials Engineering, McCill University, 3610 University Street, Montreal, QC, Canada H3A 0C5;

    Department of Process Engineering and Applied Science, Dalhousie University, 1360 Barrington Street, Halifax, NS, Canada B3J 1Z1;

    Department of Mining and Materials Engineering, McCill University, 3610 University Street, Montreal, QC, Canada H3A 0C5;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Spark plasma sintering; Aluminum alloys; Powder metallurgy;

    机译：火花等离子体烧结;铝合金;粉末冶金;

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