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功能材料 2007年第8期38卷 1373-1376页

作者：孙维民郑卓刘正沈阳工业大学理学院辽宁沈阳110023 沈阳工业大学材料科学与工程学院辽宁沈阳110023

用电弧放电法在H2+CH4+Ar的混合气氛中蒸发fe-Ti合金制备了fe-tic复合纳米粉体。用XRD、TEM、DSC-TG、化学分析和氧含量分析等手段对样品进行了分析。结果表明,粉体由fe、tic和少量fe3C组成,复合粒子的形态主要有哑铃形和多面体形,复合... 详细信息

用电弧放电法在H2+CH4+Ar的混合气氛中蒸发fe-Ti合金制备了fe-tic复合纳米粉体。用XRD、TEM、DSC-TG、化学分析和氧含量分析等手段对样品进行了分析。结果表明,粉体由fe、tic和少量fe3C组成,复合粒子的形态主要有哑铃形和多面体形,复合粒子的生成机制遵寻VLS机制。在室温大气条件下,粉体中tic相的含量越高则抗氧化性越好。在流动空气中,温度高于330℃时样品氧化明显加快,在410℃左右,tic纳米粒子氧化分解。

关键词：直流电弧 fe-tic 复合纳米粉体氧化特性

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Investigation and Optimization of Sn/Gr Lubricants Effects on Cold Extrudability of fe-tic Nanocomposite Using Taguchi Robust Design Method

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Engineering（科研） 2011年第7期3卷 700-707页

作者： Seyed Abdolkarim Sajjadi Seyed Mojtaba Zebarjad Nasrin Sasani Heydar Khadivi Behrooz Naderi 不详

The present study deals with the effects of both tin (Sn) and graphite (Gr) powders on the cold extrudability of fe-tic nanocomposites as lubricant. The production process includes low-energy ball milling, powder metallurgy and cold direct Extrusion. Due to various factors influencing the extrudability of the fe-tic nanocomposites, such as milling time, rate of extrusion, type and content of lubricant and etc, Taguchi robust design method of system optimization was used to determine the approximate contribution percent (% ρ) of each factor. In order to investigation of fe-tic properties, samples with best quality of extrusion were analyzed by XRD and SEM investigations. The results indicate that, sitting the atomic layers of Sn lubricant between fe and tic particles leads to decreasing the friction. In this case sliding the particles on each other is easier and a part of the load is applied on lubricant. The results of extrusion of samples indicate that using 2% Sn admixed and die wall graphite lubrication can improve cold extrudability of fe-tic nanocomposites.

关键词： Extrudability fe-tic Lubricant Nanocomposite Taguchi Robust Design Method

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