多晶六硼化铈的制备及性能

发布时间：2018-03-20 06:02

  本文选题：放电等离子烧结　切入点：六硼化铈　出处：《功能材料》2017年08期 　论文类型：期刊论文

【摘要】：采用放电等离子烧结技术(SPS)制备了高致密度CeB6多晶块体,考察了烧结工艺参数对多晶CeB6样品性能的影响。结果表明,随着烧结温度和烧结压力的升高,样品的致密度逐渐增大,力学性能显著提升。最佳烧结工艺参数为T=1 900℃,P=50 MPa,t=5 min,该工艺下多晶CeB6样品的致密度为95.88%,硬度为(19.37±0.65)GPa,抗弯强度为(124.82±6.24)MPa。分别在1 500,1 600,1 700℃条件下,测试了该样品的热发射电流密度,结果表明随着阴极温度的升高,多晶CeB6的最大热电子发射电流密度从3.14 A/cm2上升到18.45A/cm2,最小逸出功为3.05eV。
[Abstract]:High density CeB6 polycrystalline bulk was prepared by spark plasma sintering (SPS). The effects of sintering process parameters on the properties of polycrystalline CeB6 samples were investigated. The results showed that the density of the samples increased with the increase of sintering temperature and sintering pressure. The mechanical properties were improved significantly. The optimum sintering process parameters were: TX 1 900 鈩，

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