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【期刊论文】Raman spectra of carbon nanotubes and nanofibers prepared by ethanol flames∗
潘春旭, YUELI LIU, CHUNXU PAN‡, JIANBO WANG
JOURNAL OF MATERIALS SCIENCE 39(2004)1091-1094,-0001,():
-1年11月30日
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【期刊论文】Synthesis and growth mechanism of carbon nanotubes and nanofibers from ethanol flames
潘春旭, Chunxu Pan a, b, *, Yueli Liu a, Feng Cao a, Jianbo Wang a, Yaoyao Ren a
Micron 35(2004)461-468,-0001,():
-1年11月30日
The ethanol flame was successfully used to synthesize highly graphitic hollow-cored carbon nanotubes (CNTs) and novel disorder solidcored carbon nanofibers (CNFs). Their morphologies were characterized by using scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy and Raman spectroscopy. It was found that the mixture of CNTs and CNFs were grown on Ni-contained substrates, whereas only the CNFs were produced on carbon steel and low alloy steel substrates. It has been established that Ni and its compounds play a key role in CNTs growth and Fe and its compounds in CNFs growth. The models of 'hollowcored mechanism' and 'solid-cored mechanism' were proposed to explain the present CNTs and CNFs formations, based on the theory that 'Fe has a strong affinity for carbon and Ni has a weak affinity for carbon'. It is expected that the present ethanol flame may provide a much simpler and more economic approach for mass-production of CNTs and CNFs by using large flame or multi-flames.
Carbon fibers, Carbon nanotubes, Combustion, Electronic microscopy, Raman spectroscopy
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【期刊论文】Cr5Mo异种钢焊接熔合区H2s腐蚀过程的原位观察*
潘春旭, 邹杨), , ), 傅强, 陈超)
金属学报,2005,41(4)421~426,-0001,():
-1年11月30日
将经不同条件处理后的cr5M0+A302异种焊接接头放入NAcE(TM-01-77)+H2s标准溶液中进行不同时间的腐蚀性研究,在扫描电镜(sEM)下逐次原位跟踪观察熔合区同一部位经不同腐蚀时间后的变化过程。研究结果表明:(1)与其它特征区相比,熔合区的耐腐蚀性能最差,产生“氢致剥离开裂”;(2)经过焊后热处理的熔合区的抗腐蚀性进一步降低;(3)宽熔合区具有较强的抗“剥离开裂”腐蚀能力。上述现象与熔合区组织不均匀、碳迁移、氢富集和应力集中等因素有关。
Cr5M0,, 异种钢焊接,, 熔合区,, H2S腐蚀,, 焊后热处理
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【期刊论文】Novel solid-cored carbon nanofiber grown on steels substrates in ethanol flames
潘春旭, CHUNXU PAN∗, YUELI LIU, FENG CAO
JOURNAL OF MATERIALS SCIENCE 40(2005)1293-1295,-0001,():
-1年11月30日
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潘春旭, 祁祥, , *
电子显微学报,2005,24(2):100~107,-0001,():
-1年11月30日
本文利用民用液化石油气为碳源,在经过预处理的低碳钢和含Ni合金钢等基板上成功地制备出“空心”碳纳米管(CNTs)和“实心”碳纳米纤维(CNFs)等一维碳纳米材料。实验发现基板预处理对一维碳纳米材料的制备起着决定性的作用,如:机械研磨预处理时很难制备出一维碳纳米材料,而采用涂覆和电镀处理则很容易获得一维碳纳米材料。利用场发射枪高分辨扫描电镜(SEM)、透射电镜(TEM)和激光拉曼光谱(RS)等技术对碳纳米材料的结 构进行了表征。从本实验可以预见,制备一维碳纳米材料将变得更简单,更经济。
一维碳纳米材料, 碳纳米管, 碳纳米纤维, 火焰, 液化石油气(, liquefied petroleum gas LPG),
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