Sinterability of Y-Doped BaZrO3 with Micro- and Nano-CaO Additives and Its Interaction with Titanium Alloy
The effects of micro- and nano-CaO additive on the sinterability of Y-doped BaZrO3 and its interface reaction with titanium alloys were investigated. The 10 mol% micro- and nano-CaO is doped into BaZr0.97Y0.03O3 (BZY), respectively. The sinterability of BZY with micro- and nano-CaO was investigated by density analyzer, SEM and XRD. The relative density of BZY pellets with micro- and nano-CaO addition improved from 88% to 97.5% and 98% at 1750 °C for 6 h, respectively. XRD and SEM(BSE) show no secondary phase in the two sintered ceramics, which indicates that a single phase of cubic perovskite-type structure of Ca-modified BZY can be obtained. After melted titanium alloys, the erosion layer is 70 μm with nano-CaO addition, while a 310 μm erosion layer with micro-CaO addition. This shows that nano-CaO can be used as an appropriate sintering aid and can prevent the Y-doped BaZrO3 refractory from erosion.
KeywordsSinterability Y-doped BaZrO3 CaO additive Interface reaction Titanium alloy
The authors thank the National Natural Science Foundation of China (No.: 51574164, U1760109); Basic Major Research Program of Science and Technology Commission Foundation of Shanghai (No.: 14JC1491400). China Postdoctoral Science Foundation funded project (2018M632081).
- 6.Liu HB, Shen B, Zhu M et al (2008) Reaction between Ti and boron nitride based investment shell molds used for casting titanium alloys. Rare Met 27(6):617–622Google Scholar
- 11.Zhang Z, Zhu KL, Liu LJ et al (2013) Preparation of BaZrO3 crucible and its interfacial reaction with molten titanium alloys. J Chin Ceram Soc 41(9):1278–1283Google Scholar
- 12.He J, Wei C, Li MY et al (2015) Interface reaction between BaZrO3 refractory and melted TiAl alloys. Trans Nonferrous Met Soc China (in Chinese) 6(25):1505–1511Google Scholar
- 13.Chen GY, Chen ZW, Wang SS et al (2016) Interfacial reaction between high reactivity titanium melt and BaZrO3 refractory. J Chin Ceram Soc 44(6):890–895Google Scholar
- 23.Han D, Shinoda K, Tsukimoto S et al (2014) Origins of structural and electrochemical influence on Y-doped BaZrO3 heat-treated with NiO additive. J Mater Chem A 2(31):61–63Google Scholar
- 24.Chen GY, Li BT, Gao PY et al (2017) Effect of CaO on preparation of BaZrO3 refractory and its interfacial reaction to titanium alloy. J Chin Ceram Soc 45(9):1354–1359Google Scholar
- 30.Lai YQ, Zhang Y, Zhang G et al (2008) Effect of CaO doping on densification of 10NiO-NiFe2O4 composite ceramics. Chin J Nonferrous Metals 18(5):851–855Google Scholar
- 33.Liu Y, Wu CL, Huang WZ et al (2006) Effect of nano-Al2O3 powder additive on sintering behaviors of alumina ceramics. J Anhui Univ Sci Technol (Nat Sci) 26(01):41–44Google Scholar