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置氫TC4鈦合金與Al2O3陶瓷擴散連接工藝研究
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國家自然科學基金項目 (51275133)；哈爾濱工業(yè)大學（威海）校科研基金 (HIT(WH)201208)


Research on Diffusion Bonding of Hydrogenated TC4 Alloy to Al2O3 Ceramic
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    摘要:

    采用直接擴散連接的方法實現了置氫TC4鈦合金與Al2O3陶瓷的連接，利用光學顯微鏡、掃描電子顯微鏡、能譜分析以及X射線衍射等分析手段，確定了TC4/Al2O3擴散連接接頭典型的界面結構為TC4/α-Ti/Ti3Al+Al2TiO5/Al2O3。研究了連接溫度對TC4/Al2O3接頭界面結構的影響規(guī)律，隨著連接溫度的升高各反應層厚度逐漸增加?；诜磻獎恿W方程，計算了氫含量 (質量分數) 為0%、0.3%、0.4%時，Ti3Al+Al2TiO5層的反應激活能分別為213、172、152 kJ/mol。當連接溫度為840 ℃，連接時間為90 min，氫含量為0.4%時，接頭抗剪強度達到最大值為128 MPa，斷口分析表明斷裂主要發(fā)生在Al2O3陶瓷母材側

    Abstract:

    Direct diffusion bonding of hydrogenated TC4 alloy to Al2O3 ceramic was achieved. The typical interfacial microstructure of TC4/Al2O3 joint was TC4/α-Ti/Ti3Al + Al2TiO5/Al2O3, which was confirmed by means of OM, SEM coupled with EDS and XRD. The effect of the bonding temperature on the microstructure of joints was investigated. Results show that the phase constitution of reaction layers dose not change when the bonding temperature is changed. However, with an increase of the diffusion temperature, the thickness of each reaction layer increases. The activation energy of Ti3Al + Al2TiO5 layer are 213, 172 and 152 kJ/mol, respectively when the hydrogen contents are 0 wt%, 0.3 wt% and 0.4 wt%. The maximum shear strength of the joint reaches 128 MPa when the bonding temperature is 840 °C for 90 min and the hydrogen content in TC4 is 0.4 wt%. Moreover, fracture analysis shows that fracture occurs in the Al2O3 base metal side

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王義峰,曹 健,宋曉國,鄭祖金,馮吉才.置氫TC4鈦合金與Al2O3陶瓷擴散連接工藝研究[J].稀有金屬材料與工程,2013,42(3):598~602.[Wang Yifeng, Cao Jian, Song Xiaoguo, Zheng Zujin, Feng Jicai. Research on Diffusion Bonding of Hydrogenated TC4 Alloy to Al2O3 Ceramic[J]. Rare Metal Materials and Engineering,2013,42(3):598~602.]
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  • 收稿日期:2012-03-14
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