Effect of Pulse Current on the Oxide Layer during Pulse Current Pressure Sinteing of Aluminum Powder
Effect of Pulse Current on the Oxide Layer during Pulse Current Pressure Sinteing of Aluminum Powder
复制标题
铝粉脉冲电流压力烧结过程中脉冲电流对氧化层的影响
DOI：
10.2320/jinstmet1952.65.8_726
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发表时间：
2001
影响因子：
--
通讯作者：
S. Saji
中科院分区：
文献类型：
--
作者：
T. Nagae;M. Yokota;M. Nose;S. Tomida;Takashi Kamiya;S. Saji
采用脉冲电流加压烧结和热压烧结工艺对水雾化法和气体雾化法生产的铝粉进行烧结。与热压烧结相比，脉冲电流压力烧结可以在较低的温度下去除H2气体，从而在较短的时间内使水雾化粉末致密化。该气体防止铝粉烧结。含氢量低的脉冲电流压力烧结气体雾化粉末的抗拉强度高于热压试样。采用脉冲电流加压烧结工艺得到的烧结试样的电阻率低于热压试样。通过电阻率的测量证实了氧化层的破坏。氧化层被认为是由高温区，这是由于焦耳热的接触电阻断裂。
The pulse current pressure sintering and hot press process were applied for sintering of aluminum powder produced by water and gas atomizing methods. The pulse current pressure sintering process could densify the water atomized powder in a short time compared with the hot pressing because it could remove the H2 gas at lower temperature. The gas prevents sintering of aluminum powder. The tensile strength of the pulse current pressure sintered gas atomized powder which contains low H2 was higher than that of hot pressed specimen. The electric resistivity of sintered specimens obtained by pulse current pressure sintering process was lower than that of hot pressed specimen. The oxide layer destruction was confirmed by this measurement of electric resistivity. The oxide layers were supposed to be fractured by the high temperature zone which was attributed to joule heat by the contact resistance.