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首页> 外文会议>Materials forum - aluminium alloys, their physical and mechanical properties - Volume 28 - 2004 >Properties of Al-AlB2 MaterialsProcessed by Mechanical Alloying and Spark Plasma Sintering
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Properties of Al-AlB2 MaterialsProcessed by Mechanical Alloying and Spark Plasma Sintering

机译：机械合金化和电火花等离子烧结Al-AlB2材料的性能

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摘要

Powder mixtures of air-atomized pure aluminium and AlB2 were mechanically alloyed (MA)rnusing a vibrational ball mill to produce Al100-x(AlB2)x, where X = 15, 30, 50. Mechanicallyrnalloyed powders were consolidated by spark plasma sintering (SPS). Mechanochemicalrnreactions of the MA powders after various heat treatments were studied. The mechanicalrnproperties of the SPS materials were evaluated by hardness and compression testing.rnThe Al50(AlB2)50 powder exhibited a Vickers hardness greater than 400 after milling for 64rnh. Formation of Al3BC and γ-Al2O3 occurred in MA powders after heating at 773 K for 24 h.rnNo significant softening of the MA powders was observed after heating at 773 K for 24 h.rnFull densification of the SPS materials from MA powders of Al85(AlB2)15 was achievedrnusing an applied pressure of 49 Mpa at 873 K for 1 h. The room temperature compressivernproof stress of SPS-consolidated Al85(AlB2)15 was 520 Mpa and 620 Mpa after 4 h and 8 hrnof MA, respectively.
机译：使用振动球磨机对空气雾化的纯铝和AlB2的粉末混合物进行机械合金化（MA），以生产Al100-x（AlB2）x，其中X = 15、30、50。通过火花等离子体烧结（SPS）固结机械合金化的粉末）。研究了各种热处理后MA粉末的机械化学反应。通过硬度和压缩试验评估了SPS材料的机械性能。Al50（AlB2）50粉末在研磨64rnh后表现出的维氏硬度大于400。在773 K加热24 h后，MA粉末中会形成Al3BC和γ-Al2O3.rn在773 K加热24 h后未观察到MA粉末的明显软化。rn从Al85的MA粉末中使SPS材料完全致密化通过在873 K下施加49 Mpa的压力1 h获得AlB2）15。 SPS固结的Al85（AlB2）15在4 h和8 hrnof MA后的室温耐压应力分别为520 Mpa和620 Mpa。

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