標題: Interfacial reactions between Ti-6Al-4V alloy and zirconia mold during casting
作者: Lin, KF
Lin, CC
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 1-十二月-1999
摘要: The interface of Ti-6Al-4V casting and ZrO2 mold with silica binder was investigated by using electron probe microanalyses (EPMA), X-ray diffraction (XRD), and analytical transmission electron microscope (TEM). The interfacial reactions were proceeded by the penetration of liquid titanium through open pores near the mold surface. The metal side consisted of an alpha-phase layer on the top of the typical alpha + beta two-phase substrate. In the ceramic side, zirconia was reduced by titanium to form oxygen-deficient zirconia ZrO2-x and evolved a gaseous phase (presumably oxygen). The SiO2 binder, dissolved in the ZrO2 mold, could react with titanium to form Ti5Si3 in the metal side. Meanwhile, titanium could transform to titanium suboxides TiyO (y greater than or equal to 2) and the lower phase boundary of cubic ZrO2-x was shifted to ZrO1.76. Some amount of the stabilizer CaO, dissolved in Ti along with ZrO2, could react with Ti(O) to form Ca3Ti2O7 and CaAl4O7 in the reaction zone. (C) 1999 Kluwer Academic Publishers.
URI: http://dx.doi.org/10.1023/A:1004791125373
http://hdl.handle.net/11536/30915
ISSN: 0022-2461
DOI: 10.1023/A:1004791125373
期刊: JOURNAL OF MATERIALS SCIENCE
Volume: 34
Issue: 23
起始頁: 5899
結束頁: 5906
顯示於類別:期刊論文


文件中的檔案:

  1. 000083227700027.pdf