Interface Reaction between DD6 Single Crystal Superalloy and Ceramic Core

2021 ◽  
Vol 1035 ◽  
pp. 297-304
Author(s):  
Jian Sheng Yao ◽  
Long Pei Dong ◽  
Li Li Wang ◽  
Shu Yang ◽  
Wei Yang ◽  
...  
Keyword(s):  
Reaction Time ◽  
Single Crystal ◽  
Interfacial Reaction ◽  
Interface Reaction ◽  
Ceramic Materials ◽  
Single Crystal Superalloy ◽  
Dense Layer ◽  
Ceramic Core ◽  
Interface Reactions ◽  
The Core

The interfacial reaction between alloys and ceramic materials is an important factor to influence the quality and service performance of the turbine blade. In this paper, three typical height sections of 120mm, 160mm and 210mm were selected, and the interface reactions between DD6 single crystal superalloy and silica based ceramic cores were investigated by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS). The results showed that the infiltration degree of the melt alloy increases with the increase of reaction time. The thickness of the reaction layer could be over 0.3mm when the reaction time increased up to 70min. The main reasons of forming the infiltration layer were the infiltration of the Al element and the interfacial reaction between the Al element and the ceramic core. There formed an aluminum deficient layer on the metal surface because of the interface reaction between the alloy and the ceramic core. The dense layer formed by interfacial reaction on the surface of the core will cause some difficulties for core leaching. Keywords: DD6 single crystal superalloy; Silica based ceramic core; Interface reaction

Some new observations on interface reaction between nickel-based single crystal superalloy CMSX-4 and silicon oxide ceramic core

2020 ◽  
Vol 177 ◽  
pp. 108969
Author(s):  
Weidong Xuan ◽  
Lufa Du ◽  
Ge Song ◽  
Xiaona Zhang ◽  
Huaiwei Zhang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Silicon Oxide ◽  
Interface Reaction ◽  
Single Crystal Superalloy ◽  
Oxide Ceramic ◽  
Ceramic Core

The Properties of Water Hydraulic High-Speed On/Off Valve Ceramic-Based

2012 ◽  
Vol 488-489 ◽  
pp. 340-344
Author(s):  
Qing Hui Wang ◽  
Zhang Yong Wu ◽  
Zhen Hua Duan ◽  
Cheng Zhuo Wen ◽  
Xi Wu
Keyword(s):  
High Speed ◽  
High Strength ◽  
Ceramic Materials ◽  
Structure Design ◽  
Ceramic Core ◽  
The Core ◽  
Practical Standpoint ◽  
Weight Loss Method ◽  
Water Hydraulic ◽  
Loss Method

In order to solve the severe wear problem of the core in water hydraulic high-speed on/off valve, according to the requirements of high-speed on/off valve components in water hydraulic transmission and from the practical standpoint, the core manufactured with ceramic materials could bring its advantages of high strength, big hardness, good wearability, non-affection with corrosion into play.By the wear-resisting experiment the wear case of Si3N4 ceramic core has been studied with weight-loss method by electronic analysis balanc.The results show that the core manufactured with Si3N4 has high abrasion resistance and low wear rate, and the structure design of water hydraulic high-speed on/off valve with ceramic core is reasonable and the performance is good.

Effect of Y content on interface reaction and wettability between a nickel-base single crystal superalloy melt and ceramic mould

2019 ◽  
Vol 789 ◽  
pp. 472-484 ◽  
Author(s):  
Yun Zi ◽  
Jie Meng ◽  
Chaowei Zhang ◽  
Yanhong Yang ◽  
Yizhou Zhou ◽  
...  
Keyword(s):  
Single Crystal ◽  
Interface Reaction ◽  
Single Crystal Superalloy ◽  
Nickel Base

Effect of Directional Solidification Condition on Interfacial Reaction between DD6 Single Crystal Superalloy and Zirconia-Silica Ceramic Core

2014 ◽  
Vol 926-930 ◽  
pp. 72-76
Author(s):  
Li Li Wang ◽  
Jia Rong Li ◽  
Ding Zhong Tang ◽  
Guo Hong Gu ◽  
Xin Li ◽  
...  
Keyword(s):  
Single Crystal ◽  
Directional Solidification ◽  
Interfacial Reaction ◽  
Optical Microscope ◽  
Single Crystal Superalloy ◽  
Main Reaction ◽  
Main Reaction Product ◽  
Solidification Condition ◽  
Al Content ◽  
Interdependent System

The characterization of the interfaces between DD6 single crystal superalloy and zirconia-silica (ZrO2-SiO2) ceramic cores was performed by optical microscope (OM), SEM and EDS analysis in order to study the influence of directional solidification condition on the interfacial reaction. The results showed that there were chemical reactions on interfaces between DD6 melt and ZrO2-SiO2ceramic cores and the main reaction product was Al2O3. The interfacial reaction involved a complex, interdependent system including the oxidation of Al element, the destabilization of calcia stabilization zirconia (CSZ) and the formation of liquid phase with low melting point. The intensity of interfacial reaction increased with the increase of pouring temperature and solidification time, but the number and size of reaction zones could not increase together because of the limited Al content in DD6 alloy.

Investigations on Interface Reactions and Wettability between Melt Superalloys and Ceramic Materials

2016 ◽  
Vol 703 ◽  
pp. 132-137 ◽  
Author(s):  
Xiao Yan Chen ◽  
Fei Li ◽  
Jun Wang ◽  
Bao De Sun
Keyword(s):  
Ceramic Material ◽  
Sessile Drop ◽  
Active Element ◽  
Interface Reaction ◽  
Ceramic Materials ◽  
Wetting Angle ◽  
Reactive System ◽  
Reaction Products ◽  
Interface Reactions ◽  
Sessile Drop Experiment

Interface reactions and wettability between melt superalloys and ceramic mould materials were investigated by using a sessile drop experiment. The wetting angle of the melt alloy on the ceramic material was calculated and the microstructure of the alloy interface was investigated by metalloscope as well as SEM. It was found that active element C in the alloy is an important factor that influences the interface reactions and the wettability. Alloys with C content lower than 0.07wt.% were almost stable on the ceramic material and no interface reaction products were found. However, alloys with C content higher than 0.16wt.% reacted with the ceramic materials. Purple reaction products were found on the alloy surface and sand adhesions were observed at the alloy-ceramic interface. In the non-reactive system, the wetting angle is in the range of 135o-150o. In the reactive system, the wetting angle is lower than 120o.

Microanalysis of silicate glass films grown on α-Al2O3 by pulsed-laser deposition

1993 ◽  
Vol 51 ◽  
pp. 438-439
Author(s):  
Michael P. Mallamaci ◽  
James Bentley ◽  
C. Barry Carter
Keyword(s):  
Liquid Phase ◽  
Single Crystal ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Ceramic Materials ◽  
Laser Deposition ◽  
Triple Junctions ◽  
Ion Milling ◽  
Multicomponent Oxides ◽  
Glass Films

Glass-oxide interfaces play important roles in developing the properties of liquid-phase sintered ceramics and glass-ceramic materials. Deposition of glasses in thin-film form on oxide substrates is a potential way to determine the properties of such interfaces directly. Pulsed-laser deposition (PLD) has been successful in growing stoichiometric thin films of multicomponent oxides. Since traditional glasses are multicomponent oxides, there is the potential for PLD to provide a unique method for growing amorphous coatings on ceramics with precise control of the glass composition. Deposition of an anorthite-based (CaAl2Si2O8) glass on single-crystal α-Al2O3 was chosen as a model system to explore the feasibility of PLD for growing glass layers, since anorthite-based glass films are commonly found in the grain boundaries and triple junctions of liquid-phase sintered α-Al2O3 ceramics.Single-crystal (0001) α-Al2O3 substrates in pre-thinned form were used for film depositions. Prethinned substrates were prepared by polishing the side intended for deposition, then dimpling and polishing the opposite side, and finally ion-milling to perforation.

Crystal Plasticity Assessment to Crystallographic Stage I Cracking in a Ni-Based Single Crystal Superalloy

2018 ◽  
Author(s):  
Motoki Sakaguchi ◽  
Ryota Komamura ◽  
Mana Higaki ◽  
Xiaosheng Chen ◽  
Hirotsugu Inoue
Keyword(s):  
Single Crystal ◽  
Crystal Plasticity ◽  
Stage I ◽  
Single Crystal Superalloy

New Phases in a Multicomponent High Ruthenium Single Crystal Superalloy

2005 ◽  
Vol 475-479 ◽  
pp. 655-660 ◽  
Author(s):  
Q. Feng ◽  
L.J. Rowland ◽  
T.M. Pollock
Keyword(s):  
Single Crystal ◽  
Dendritic Structure ◽  
Thermal Exposure ◽  
Single Crystal Superalloy ◽  
Heusler Phase ◽  
Topologically Close Packed ◽  
Tcp Phases ◽  
Δ Phase

Three unusual Ru-rich phases have been identified in a multicomponent Ni-base single crystal superalloy, including a L21 Ru2AlTa Heusler phase, a B2 RuAl phase and a hcp Re(Ru)-rich δ phase. These phases have their own preferential precipitation location within the dendritic structure. No conventional topologically-close-packed (TCP) phases have been observed with thermal exposure at 950oC for 1500 hours.

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