Effect of C and Hf Contents on the Interface Reactions and Wettability between a Ni3Al-Based Superalloy and Ceramic Mould Material

Chen, Xiaoyan; Zhou, Yizhou; Jin, Tao; Sun, Xiaofeng

doi:10.1016/j.jmst.2015.11.007

Cited by 33 publications

(7 citation statements)

References 12 publications

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“…As reported as in the previous literature [ 21 , 23 , 25 , 30 , 31 ], some elements such as Cr, Hf and Al in the nickel-based alloy could promote the interface reaction between the alloy melt and mold facecoat. These elements also exist in large amounts in DZ22B nickel-based superalloys.…”

Section: Discussionmentioning

confidence: 56%

“…In recent years, research into the wettability between alloy melts and ceramic materials has been widely carried out. Chen et al [ 23 ] have reported that with the increasing of C and Hf in an Ni 3 Al-based superalloy, the wetting angles of alloy melt on ceramic molds decrease and the interfacial reaction becomes more aggravated. Valenza et al [ 24 ] have studied the wettability and interfacial reactions of three superalloys on different ceramic substrates and found that the compositions of alloy and ceramic have an influence on the wettability.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Fused Alumina Based-Mold Facecoats for DZ22B Directionally Solidified Blades

Yang

et al. 2019

Materials

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The interaction between alloy melt and mold facecoats is the main factor affecting the surface quality of investment casting nickel-based superalloys. An investigation was undertaken to develop suitable refractories as facecoat materials for the directionally solidified blades of DZ22B nickel-based superalloys in order to avoid a sand-burning defect. The wettability and interface reactions between alloy melt and various facecoats were studied by using a sessile drop experiment and the real investment casting method, respectively. The results show that by adding Cr2O3 powder with the amounts of 2 wt.%, 5 wt.% and 10 wt.% in the fused alumina-based facecoats, the wetting angles between the alloy melt and facecoats decreased from 105.40° to 100.37°, 99.96° and 98.11°, respectively, while the sand-burning defect on the casting blade surfaces still formed during the process of directional solidification. However, by adding h-BN powder in the fused alumina-based facecoats, the wetting angles between the alloy melt and facecoats dramatically increased, the sand-burning defect on the casting blade surfaces was effectively inhibited and a metallic luster on the directionally solidified blades could be obviously observed. In this study, the suitable composition of mold facecoats for the investment casting of blades is 2 wt.% h-BN added fused alumina.

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Section: Discussionmentioning

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Investigation of Fused Alumina Based-Mold Facecoats for DZ22B Directionally Solidified Blades

Yang

et al. 2019

Materials

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“…They found that the contact angle was larger than 90° during the continuous temperature rise, the equilibrium contact angle was 92°, and the interfacial reaction was influenced by the reduction of ZrO 2 . A recent work by Chen et al [ 21 ] showed that the interface reactions between Ni 3 Al based superalloy and Al 2 O 3 ceramic occured as C and Hf contents reached a critical value. In addition, adsorptions of Hf and interface reactions improved the wettability obviously.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Wettability and Interactions between Y-Containing Ni-Based Alloys and Various Oxide Ceramics

Zhang

Gao

et al. 2018

Materials

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To obtain appropriate crucible materials for vacuum induction melting of MCrAlY alloys, four different oxide ceramics, including MgO, Y2O3, Al2O3, and ZrO2, with various microstructures were designed and characterized. The high-temperature wettability and interactions between Ni-20Co-20Cr-10Al-1.5Y alloys and oxide ceramics were studied by sessile drop experiments under vacuum. The results showed that all the systems exhibited non-wetting behavior. The contact angles were stable during the melting process of alloys and the equilibrium contact angles were 140° (MgO), 148° (Y2O3), 154° (Al2O3), and 157° (ZrO2), respectively. The interfacial reaction between the ceramic substrates and alloys occurred at high temperature. Though the ceramics had different microstructures, similar continuous Y2O3 reaction layer with thicknesses of about 25 μm at the alloy-ceramic interface in MgO, Al2O3, and ZrO2 systems formed. The average area percentage of oxides in the alloy matrices were 0.59% (MgO), 0.11% (Al2O3), 0.09% (ZrO2), and 0.02% (Y2O3), respectively. The alloys, after reacting with MgO ceramic, had the highest inclusion content, while those with the lowest content were in the Y2O3 system. Y2O3 ceramic was the most beneficial for vacuum induction melting of high-purity Y-containing Ni-based alloys.

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“…Silica-based ceramic moulds are often used as mouldmaterials thathave high bending strength and low deflection. However, during the casting process, interfacial reactions occur between the silica-based ceramic moulds and molten Ni because of the presence of reactive elements, such as Al [3][4][5][6], Cr [7][8][9], and Hf [10][11][12][13]. Interfacial reactions easily cause inclusions that are difficult to remove.…”

Section: Introductionmentioning

confidence: 99%

“…Trace amounts of REEs are often added to remove impurities (such as sulphur) and improve the performance of oxidation resistance and creep resistance [7,8]. REEs are so reactive that Xue [15] found severe interfacial reactions between yttrium and silica-based moulds during casting.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations and thermodynamic calculations of the interface reactions between ceramic moulds and Ni-based single-crystal superalloys: Role of solubility of Y in the LaAlO3 phase

Wang

Shang

Liao

et al. 2018

Ceramics International

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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

show abstract

Effect of C and Hf Contents on the Interface Reactions and Wettability between a Ni3Al-Based Superalloy and Ceramic Mould Material

Cited by 33 publications

References 12 publications

Investigation of Fused Alumina Based-Mold Facecoats for DZ22B Directionally Solidified Blades

Investigation of Fused Alumina Based-Mold Facecoats for DZ22B Directionally Solidified Blades

High-Temperature Wettability and Interactions between Y-Containing Ni-Based Alloys and Various Oxide Ceramics

Experimental investigations and thermodynamic calculations of the interface reactions between ceramic moulds and Ni-based single-crystal superalloys: Role of solubility of Y in the LaAlO3 phase

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