| 放电等离子体烧结W粉数值模拟 |
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| 引用本文： | 陈小安,尚福军,宋顺成.放电等离子体烧结W粉数值模拟[J].粉末冶金技术,2010,28(4). |
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| 作者姓名： | 陈小安 尚福军 宋顺成 |
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| 作者单位： | 1. 西南交通大学力学与工程学院,成都,610031
2. 中国兵器科学研究院宁波分院,浙江宁波,315103 |
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| 摘 要： | 根据传热学以及电磁理论,在放电等离子体烧结的典型烧结条件下建立了电热耦合控制方程,利用有限元方法对W粉试样在烧结中的电热效应进行了数值模拟,得到烧结过程中电流密度、能量密度以及温度场分布。结果表明:放电等离子体烧结升温速率快,半径大小影响模具轴向温度梯度,试样径向有较高的温度梯度,影响烧结后试样的均匀性。
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| 关 键 词： | 放电等离子体烧结 温度场 数值模拟 |
Numerical simulation for spark plasma sintering of W powder |
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| Chen Xiaoan,Shang Fujun,Song Shuncheng.Numerical simulation for spark plasma sintering of W powder[J].Powder Metallurgy Technology,2010,28(4). |
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| Authors: | Chen Xiaoan Shang Fujun Song Shuncheng |
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| Affiliation: | Chen Xiaoan1),Shang Fujun2),Song Shuncheng1)1)(Southwest Jiaotong University,School of Mechanics and Engineering,Chengdu 610031,China),2)(Ningbo Sub-academy of National Ordance Science Academy,Ningbo Zhejiang 315103 |
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| Abstract: | The control equations of electrothermal coupling were set up based on the theory of heat transfer and electromagnetics under typical spark plasma sintering(SPS) conditions.The electrothermal phenomena of tungsten powder and die and punches in sintering process were simulated using the software Comsol Multiphysics based on the finite element method.The current density,power density and temperature distribution were obtained.It's found that high heating rate and die radius affect temperature gradient of the g... |
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| Keywords: | spark plasma sintering temperature field numerical simulation |
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