Preparation of a novel Sr-Zr oxide refractory for induction melting of high-activity alloy

Xiao, Yubin; Chen, Guangyao; Yu, Feihai; Hou, Xiao; Zhang, Yin; Zou, Xingli; Lu, Xionggang; Li, Chonghe

doi:10.1016/j.jeurceramsoc.2021.05.054

Cited by 8 publications

(6 citation statements)

References 19 publications

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“…However, an interaction zone between Al 2 O 3 and titanium alloy was observed [10]. ZrO 2−x and α-Ti(O) were detected after melting with the ZrO 2 crucible [12]. The thermal shock resistance of the Y 2 O 3 crucible was poor [13].…”

Section: Introductionmentioning

confidence: 99%

Preparation of a (Ca,Sr,Ba)ZrO3 Crucible by Slip Casting for the Vacuum Induction Melting of NiTi Alloy

Ding,

Li,

Wang

et al. 2024

Materials

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Vacuum induction melting is a more energy-efficient process for the preparation of a titanium alloy with good homogeneity and low cost. But the crucial problem for this technology is in developing a crucible refractory with high stability. In the present work, a novel (Ca,Sr,Ba)ZrO3 crucible was prepared by slip casting and its performance in melting NiTi alloy was studied. The results showed that a single solid solution was formed with a homogeneous distribution of metal elements after sintering at 1500 °C. It was found that the total content of oxygen and nitrogen remaining in the TiNi alloy after melting in the (Ca,Sr,Ba)ZrO3 crucible was 0.0173 wt.%, which fulfills the ASTM standard on biomedical TiNi alloys. The good resistance of the (Ca,Sr,Ba)ZrO3 crucible to molten NiTi has a relationship with the sluggish diffusion effect of high-entropy ceramics. This study provides insights into the process of designing highly suitable crucible material for melting a NiTi alloy.

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Section: Introductionmentioning

confidence: 99%

Preparation of a (Ca,Sr,Ba)ZrO3 Crucible by Slip Casting for the Vacuum Induction Melting of NiTi Alloy

Ding,

Li,

Wang

et al. 2024

Materials

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“…However, titanium alloy melts exhibit high chemical activity. 7 Oxide ceramics were preferred in the majority of research looking at the melting of titanium in refractory crucibles, mostly because of their low Gibbs energy. 8 Several commonly used refractories such as Y 2 O 3 , 9 CaO, 10 ZrO 2 , 11 and Al 2 O 3 12 have been evaluated as crucible materials in contact with titanium alloy melts.…”

Section: Introductionmentioning

confidence: 99%

“…However, titanium alloy melts exhibit high chemical activity 7 . Oxide ceramics were preferred in the majority of research looking at the melting of titanium in refractory crucibles, mostly because of their low Gibbs energy 8 .…”

Section: Introductionmentioning

confidence: 99%

Role of Ca additive on the effect of phase composition and microstructure of BaZrO₃ refractory and its interaction with titanium alloys

Chen

Liu

et al. 2023

Int J Applied Ceramic Tech

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In this study, the effect of different Ca additives (Ca(OH)2, CaO, and nano‐CaCO3) on the composition and microstructure of the fused BaZrO3 crucible were investigated, as well as their interaction with Ti2Ni alloy during vacuum induction melting. Results showed that the crucibles had the same phase compositions when the doping amounts of Ca additives were the same. Three kinds of Ca additives provided three different grain sizes of CaO precursors to participate in the solid solution reaction. When the doping amount of the Ca additive was 5.3 wt.%, the ZrO2 phase in the fused BaZrO3 was disappeared, and the CaZrO3 phase was founded. The composition of the crucibles doped with 7.7 wt.% Ca additives only consisted of Ba1‐xCaxZrO3 and CaZrO3 phase. The relative densities and erosion resistance of the crucibles were improved effectively with the increase of Ca additive content. Moreover, the crucible doped with 7.7 wt.% nano‐CaCO3 additive exhibited the highest density and the thinnest erosion layer. The Ba1‐xCaxZrO3 and CaZrO3 phases were dissolved by the alloy melt, according to the interaction analysis. In addition, the crucible doped with nano‐CaCO3 additive had a higher content of refractory element concentration in the alloy melts in comparision with the other two kinds of crucibles due to their higher number of pores.

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“…Double perovskites exhibit a wide array of intriguing properties owing to their diverse compositions and structures, prompting extensive investigations into their structural characteristics [20]. In order to develop an Sr-Zr series perovskite oxide refractory for melting titanium alloys, our group attempted to prepare a novel refractory by doping rare earth elements, followed by evaluating their stability for melting titanium alloys [21]. The rare oxide such as CeO 2 has a high melting point (nearly 1950 • C).…”

Section: Introductionmentioning

confidence: 99%

Preparation of Sr2CeZrO6 Refractory and Its Interaction with TiAl Alloy

Bian,

Cai,

Liu

et al. 2023

Materials

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Vacuum induction melting in a refractory crucible is an economical method to produce TiAl-based alloys, aiming to reduce the preparation cost. In this paper, a Sr2CeZrO6 refractory was synthesized by a solid-state reaction method using SrCO3, CeO2 and ZrO2 as raw materials, and its interaction with TiAl alloy melt was investigated. The results showed that a single-phase Sr2CeZrO6 refractory could be fabricated at 1400 °C for 12 h, and its space group was Pnma with a = 5.9742(3) Å, b = 8.3910(5) Å and c = 5.9069(5) Å. An interaction layer with a 40μm thickness and dense structure could be observed in Sr2CeZrO6 crucible after melting TiAl alloy. Additionally, the interaction mechanism showed that the Sr2CeZrO6 refractory dissolved in the alloy melt, resulting in the generation of Sr3Zr2O7, SrAl2O4 and CeO2−x, which attached to the surface of the crucible.

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Preparation of a novel Sr-Zr oxide refractory for induction melting of high-activity alloy

Cited by 8 publications

References 19 publications

Preparation of a (Ca,Sr,Ba)ZrO3 Crucible by Slip Casting for the Vacuum Induction Melting of NiTi Alloy

Preparation of a (Ca,Sr,Ba)ZrO3 Crucible by Slip Casting for the Vacuum Induction Melting of NiTi Alloy

Role of Ca additive on the effect of phase composition and microstructure of BaZrO₃ refractory and its interaction with titanium alloys

Preparation of Sr2CeZrO6 Refractory and Its Interaction with TiAl Alloy

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Preparation of a novel Sr-Zr oxide refractory for induction melting of high-activity alloy

Cited by 8 publications

References 19 publications

Preparation of a (Ca,Sr,Ba)ZrO3 Crucible by Slip Casting for the Vacuum Induction Melting of NiTi Alloy

Preparation of a (Ca,Sr,Ba)ZrO3 Crucible by Slip Casting for the Vacuum Induction Melting of NiTi Alloy

Role of Ca additive on the effect of phase composition and microstructure of BaZrO3 refractory and its interaction with titanium alloys

Preparation of Sr2CeZrO6 Refractory and Its Interaction with TiAl Alloy

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Role of Ca additive on the effect of phase composition and microstructure of BaZrO₃ refractory and its interaction with titanium alloys