Interfacial Reaction Between Ti-47Al-2Cr-2Nb-xTiB2 Alloys and Al2O3 Ceramic Molds

Chen Yuyong; Niu Hongzhi; Tian Jing; Xiao Shulong; Chen Yanfei; Zhao Ertuan

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Interfacial Reaction Between Ti-47Al-2Cr-2Nb-xTiB₂ Alloys and Al₂O₃ Ceramic Molds
Vol. 30, Issue 3, Pages: 197-200(2010)
Published： 2010 ，
DOI：

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[1]陈玉勇,牛红志,田竞,肖树龙,陈艳飞,赵而团.Ti-47Al-2Cr-2Nb-xTiB_2合金与Al_2O_3陶瓷型壳界面反应的研究[J].特种铸造及有色合金,2010,30(03):197-200+189.

Chen Yuyong, Niu Hongzhi, Tian Jing, et al. Interfacial Reaction Between Ti-47Al-2Cr-2Nb-xTiB₂ Alloys and Al₂O₃ Ceramic Molds. [J]. Special Casting & Nonferrous Alloys 30(3):197-200(2010)
[1]陈玉勇,牛红志,田竞,肖树龙,陈艳飞,赵而团.Ti-47Al-2Cr-2Nb-xTiB_2合金与Al_2O_3陶瓷型壳界面反应的研究[J].特种铸造及有色合金,2010,30(03):197-200+189. DOI：

Chen Yuyong, Niu Hongzhi, Tian Jing, et al. Interfacial Reaction Between Ti-47Al-2Cr-2Nb-xTiB₂ Alloys and Al₂O₃ Ceramic Molds. [J]. Special Casting & Nonferrous Alloys 30(3):197-200(2010) DOI：

摘要

实验室条件下制备了Ti-47Al-2Cr-2Nb-xTiB2（x=0、0.6%、1.0%

体积分数）合金熔体与Al2O3陶瓷型壳的界面反应层。借助SEM、EDS、XRD以及显微硬度测量等手段

对3种TiAl基合金熔体与Al2O3陶瓷型壳的界面反应情况进行了分析和比较。结果表明

TiAl基合金中加入TiB2

能有效减少TiAl基合金熔体与Al2O3陶瓷型壳的界面反应。TiAl基合金与AlO陶瓷型壳间的界面反应是一种不均衡进行的扩散型化学反应

并建立了界面反应的宏观模型。

Abstract

Interfacial reactive layers between Ti-47Al-2Cr-2Nb-xTiB2 alloys and Al2O3 ceramic molds were fabricated.With the help of SEM（scanning electron microscope）

EDS（energy dispersive spectrum）

XRD（X-ray diffraction）and micro-hardness measurements

interfacial reactive behaviors between three kinds of TiAl based alloys and Al2O3 ceramic molds were analyzed comparatively.The results reveal that the interfacial reaction of TiAl alloy melt with Al2O3 ceramic molds can be effectively relieved by adding TiB2.The interfacial reactive mechanism was characterized by an imbalanced diffusive chemical reaction

and the corresponding reaction model is established.