| 纳米碳化钨粉体的热稳定性研究 |
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| 引用本文： | 张春华,郭亨群,王国立,宋志华,吴冲浒,吴其山. 纳米碳化钨粉体的热稳定性研究[J]. 功能材料, 2009, 40(3) |
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| 作者姓名： | 张春华 郭亨群 王国立 宋志华 吴冲浒 吴其山 |
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| 作者单位： | 华侨大学,信息科学与工程学院,福建,泉州,362021;厦门金鹭特种合金有限公司,福建,厦门,361006 |
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| 摘 要： | 以工业化生产设备条件制备纳米碳化钨粉末,对样品在不同温度下退火,采用X射线衍射法(XRD)、比表面积法(BET)、冷场发射扫描电子显微镜(FESEM)、透射电子显微镜(TEM)、激光光散射法对退火前后样品的物相、粒度及其分布进行表征.研究结果表明,温度是影响纳米WC颗粒长大的一个重要因素,随着退火温度升高,纳米WC颗粒尺寸随之增大.同时在不同升温速率下测的DSC吸收峰值,计算了纳米WC颗粒的长大激活能.在此基础上,对实验现象产生的原因进行了分析讨论.
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| 关 键 词： | 纳米碳化钨 粒度表征 表面能各向异性 |
Research of thermal stability of nanocrystalline tungsten carbide powder |
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| ZHANG Chun-hua,GUO Heng-qun,WANG Guo-li,SONG Zhi-hua,WU Chong-hu,WU Qi-shan. Research of thermal stability of nanocrystalline tungsten carbide powder[J]. Journal of Functional Materials, 2009, 40(3) |
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| Authors: | ZHANG Chun-hua GUO Heng-qun WANG Guo-li SONG Zhi-hua WU Chong-hu WU Qi-shan |
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| Affiliation: | 1.College of Information Science and Engineering;Huaqiao University;Quanzhou 362021;China;2.Xiamen Golden Egret Special Alloy Co.Ltd.;Xiamen 361006;China |
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| Abstract: | Nanocrystalline tungsten carbide(nano-WC) powder was prepared on the basis of the industrialized production equipment and were annealed at various temperature.Methods of X-ray diffraction,FSEM,TEM,specific surface area,and particle analyzer of dynamic light scattering were applied to test the phase,particle size and its distribution of nano-WC powder.The results indicated temperature was a important factor to affect the grain growth of nano-WC.The grain size increased with the high temperature.The DSC curve... |
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| Keywords: | nanocrystalline tungsten carbide particle indication surface energy anisotropy |
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