Synthesis and characterization of WC-Co nanosized composite powders with in situ carbon and gas carbon sources
Synthesis and characterization of WC-Co nanosized composite powders with in situ carbon and gas carbon sources
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原位碳和气相碳源WC-Co纳米复合粉末的合成与表征
DOI：
10.1007/s12540-016-6033-6
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发表时间：
2016-07
影响因子：
3.5
通讯作者：
Ruan Jianming
中科院分区：
文献类型：
--
作者：
Yang Qiumin;Yang Jiangao;Yang Hailin;Su Wei;Ruan Jianming
本研究采用CH 4/H2为气体碳源、可溶性淀粉为原位碳源，采用一步还原碳化工艺合成了纳米WC-Co复合粉末。碳分析和X射线衍射结果表明，在1100 °C下烧结0.5h，可得到纯WC和Co相的WC-Co纳米复合粉末。在还原-碳化过程中，较高的CH 4/H2气体流量比导致样品的总碳含量较高。场发射扫描电子显微镜证实，WC-6wt%Co复合粉末中的颗粒平均尺寸最小，为43 nm，呈等轴状。在WC-3wt%Co复合粉末中观察到烧结颈，而在WC-12wt%Co复合粉末中发现小面的颗粒。该方法具有工艺简单、合成速度快、工业应用前景好等优点。
This study presented nanosized WC-Co composite powders synthesized using a one-step reduction-carbonization process with a combination of CH4/H2 as a gas carbon source and soluble starch as an in situ carbon source. The results of carbon analysis and X-ray diffraction revealed that WC-Co nanocomposite powders with a pure WC and Co phase could be obtained at 1100 °C after 0.5 h. A higher gas flow ratio of CH4/H2 during the reduction-carbonization process led to a higher total carbon content of the sample. A field emission scanning electron microscope confirmed that the particles in the WC-6 wt% Co composite powders had the lowest average size of 43 nm with equiaxed shapes. A sintering neck was observed in the WC-3 wt% Co composite powders whereas faceted particles were found in the WC-12 wt% Co composite powders. Moreover, this method has advantages of simple processing, rapid synthesis and good applicability in potential industry application.
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DOI：
10.1007/bf02651660
发表时间：
1989-05-01
期刊：
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
影响因子：
--
作者：
GUILLERMET, AF
通讯作者：
GUILLERMET, AF
影响因子：
4.5
作者：
H. Preiss;B. Meyer;C. Olschewski
通讯作者：
H. Preiss;B. Meyer;C. Olschewski
DOI：
10.1016/j.ijrmhm.2014.08.011
发表时间：
2015-03
影响因子：
3.6
作者：
I. Konyashin;L. I. Klyachko
通讯作者：
I. Konyashin;L. I. Klyachko
影响因子：
6
作者：
Zhang, FL;Wang, CY;Zhu, M
通讯作者：
Zhu, M
影响因子：
4.6
作者：
H. Nersisyan;H. Won;C. Won;J. Lee
通讯作者：
H. Nersisyan;H. Won;C. Won;J. Lee