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Ti對SPS燒結(jié)Nb/Nb5Si3復(fù)合材料組織和性能的影響
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江西省自然科學(xué)基金（2007GZC1492）；江西省教育廳科技項目（DB200701049）


Effects of Ti Addition on Microstructure and Properties of Nb/Nb5Si3 in situ Composites by Spark Plasma Sintering
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    摘要:

    以Nb、Si和Ti粉末為原料，采用放電等離子燒結(jié)（SPS）技術(shù)對Nb-20Si、Nb-20Si-5Ti、Nb-20Si-15Ti和Nb-20Si-24Ti材料進(jìn)行原位合成。利用掃描電鏡（SEM）、電子探針微區(qū)分析（EPMA）和X射線衍射（XRD）等手段對材料的組織結(jié)構(gòu)進(jìn)行分析，探討Ti對復(fù)合材料組織和性能的影響規(guī)律。結(jié)果表明，Ti元素的加入使得復(fù)合材料中Nb5Si3相轉(zhuǎn)變成(Nb, Ti)5Si3，隨著Ti加入量的增加，組織中出現(xiàn)了單質(zhì)的Ti相，當(dāng)Ti含量達(dá)到24%時，組織中還會出現(xiàn)Nb3Si相；同時Ti的加入會降低復(fù)合材料的硬度，提高其高溫抗氧化性能

    Abstract:

    The microstructure and properties of Nb/Nb5Si3 in situ composites prepared from Nb-20Si, Nb-20Si-5Ti, Nb-20Si-15Ti and Nb-20Si-24Ti by the spark plasma sintering (SPS) technique. The microstructures of the synthesized composites were analyzed by SEM, XRD and electron probe microscopy (EPMA). The effects of Ti addition on the microstructure and properties of Nb/Nb5Si3 in situ composites were studied. The result show that the main phase of the composites changes from Nb/Nb5Si3 to Nb/(Nb, Ti)5Si3 due to the Ti addition. The pure Ti phase and Nb3Si phase are found in the composites when the Ti content reaches to 24%. With the content of Ti increasing, the hardness of Nb/Nb5Si3 in-situ composites would be decreased, but the high temperature oxidation property would be increased

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龍文元,堯軍平,張 磊,林志斌,趙 璐. Ti對SPS燒結(jié)Nb/Nb5Si3復(fù)合材料組織和性能的影響[J].稀有金屬材料與工程,2013,42(5):989~992.[Long Wenyuan, Yao Junping, Zhang Lei, Lin Zhibin, Zhao Lu. Effects of Ti Addition on Microstructure and Properties of Nb/Nb5Si3 in situ Composites by Spark Plasma Sintering[J]. Rare Metal Materials and Engineering,2013,42(5):989~992.]
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  • 收稿日期:2012-05-14
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