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管約束WC粉末電爆噴涂涂層的形成
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國家自然科學(xué)基金資助項(xiàng)目(51061011)


Coating Forming by Electrical Explosion Spraying of WC Powder in the Constraining Tube
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    摘要:

    采用壓敏膠載送粉末連續(xù)電爆噴涂方法，進(jìn)行WC粉末電爆噴涂，分析初始電壓與噴射腔橫截面積對涂層形成的影響。結(jié)果表明：在3~7 mm噴涂范圍內(nèi)，可形成表層為液相噴涂層和底層為氣相沉積層的復(fù)合涂層。在較小的噴射腔橫截面積下升高初始電壓，能提高爆炸的區(qū)域溫度和產(chǎn)物速度，增加氣相份額。分析認(rèn)為：氣相優(yōu)先形成氣相沉積層，且氣相沉積層與基體結(jié)合致密；殘留的液相滯后噴射，并覆蓋在氣相沉積層上形成液相噴涂層。

    Abstract:

    By means of powder electrical explosion spraying of continuously carrying powder with pressure-sensitive adhesive, WC coating was prepared. The effects of initial voltage and the cross-sectional area of jet chamber on the forming of coating were analyzed. The result shows that in the distance of 3~7 mm, hybrid coating is formed which consists of a surface for liquid spraying coating and a bottom for vapor deposition coating. When raising the initial voltage within minor cross-sectional area of jet chamber, the temperature and the velocity of the blast area can be increased to raise vapor share. It is thought that vapor deposition coating is formed preferentially and combined with substrate densely. Residual droplets spurt is lagged, and liquid spraying coating is formed which covers the vapor deposition coating.

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朱 亮,石茂虎,王 永.管約束WC粉末電爆噴涂涂層的形成[J].稀有金屬材料與工程,2014,43(4):968~972.[Zhu Liang, Shi Maohu, Wang Yong. Coating Forming by Electrical Explosion Spraying of WC Powder in the Constraining Tube[J]. Rare Metal Materials and Engineering,2014,43(4):968~972.]
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  • 收稿日期:2013-04-09
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  • 在線發(fā)布日期: 2014-07-30
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