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Multi-element stabilized zirconia fused salt corrosion-resisting thermal barrier coating material

A technology of molten salt corrosion and multi-component stabilization, which is applied in the field of multi-component stabilized zirconia anti-molten salt corrosion thermal barrier coating materials, which can solve the problems of poor molten salt corrosion resistance of thermal barrier coating materials and achieve excellent molten salt corrosion performance , The effect of improving the corrosion life of molten salt

Active Publication Date: 2014-09-17
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, stabilizer Y 2 o 3 and dopant Yb 2 o 3 、Gd 2 o 3 will be with Na 2 SO 4 -V 2 o 5 The molten salt reacts, the Yb 2 o 3 and Gd 2 o 3 Poor resistance to molten salt corrosion of high thermal expansion thermal barrier coating materials doped with YSZ

Method used

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  • Multi-element stabilized zirconia fused salt corrosion-resisting thermal barrier coating material
  • Multi-element stabilized zirconia fused salt corrosion-resisting thermal barrier coating material

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Embodiment 1

[0026] In this embodiment, the multi-component stabilized zirconia anti-molten salt corrosion thermal barrier coating material is made by mixing and ball milling a main agent and a stabilizer, and the main agent is ZrO 2 , the stabilizer is Lu 2 o 3 、In 2 o 3 and Al 2 o 3 The mixture of multi-component stabilized zirconia anti-molten salt corrosion thermal barrier coating material Lu 2 o 3 、In 2 o 3 、Al 2 o 3 and ZrO 2 The molar ratio of the ball mill is 5:5:5:85; the speed of the ball mill is 200r / min, and the time of the ball mill is 3h.

Embodiment 2

[0028] In this embodiment, the multi-component stabilized zirconia anti-molten salt corrosion thermal barrier coating material is made by mixing and ball milling a main agent and a stabilizer, and the main agent is ZrO 2 , the stabilizer is Lu 2 o 3 、In 2 o 3 and Al 2 o 3 The mixture of multi-component stabilized zirconia anti-molten salt corrosion thermal barrier coating material Lu 2 o 3 、In 2 o 3 、Al 2 o 3 and ZrO 2 The molar ratio is 6:6:6:82; the speed of the ball milling is 300r / min, and the time of the ball milling is 2h.

Embodiment 3

[0030] In this embodiment, the multi-component stabilized zirconia anti-molten salt corrosion thermal barrier coating material is made by mixing and ball milling a main agent and a stabilizer, and the main agent is ZrO 2 , the stabilizer is Lu 2 o 3 、In 2 o 3 and Al 2 o 3 The mixture of multi-component stabilized zirconia anti-molten salt corrosion thermal barrier coating material Lu 2 o 3 、In 2 o 3 、Al 2 o 3 and ZrO 2 The molar ratio of the ball mill is 4:4:4:88; the speed of the ball mill is 350r / min, and the time of the ball mill is 1h.

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Abstract

The invention provides a multi-element stabilized zirconia fused salt corrosion-resisting thermal barrier coating material which is formed by mixing and ball-milling of a main agent and a stabilizing agent, wherein the main agent is ZrO2; the stabilizing agent is a mixture of Lu2O3, In2O3 and Al2O3; in the multi-element stabilized zirconia fused salt corrosion-resisting thermal barrier coating material, the molar ratio of Lu2O3 to In2O3 to Al2O3 to ZrO2 is x: x: x: (100-3x); and x is greater than or equal to 4 and less than or equal to 8. According to the invention, Lu2O3, In2O3 and Al2O3 are adopted as the stabilizing agent to stabilize ZrO2 and tetragonal-phase ZrO2 and t-ZrO2 is finally obtained. The multi-element stabilized zirconia fused salt corrosion-resisting thermal barrier coating material provided by the invention has excellent fused salt corrosion-resisting property and has the advantage that the service life is increased by more than 11 times compared with the traditional YSZ (Yttria Stabilized Zirconia) barrier coating material.

Description

technical field [0001] The invention belongs to the technical field of thermal barrier coating materials, and in particular relates to a multi-component stabilized zirconia anti-melting salt corrosion thermal barrier coating material. Background technique [0002] YSZ thermal barrier coating (i.e. using Y 2 o 3 Stable ZrO 2 ) has a high melting point, low thermal conductivity (the thermal conductivity is 2W / m·k~3W / m·k), high fracture toughness (the fracture toughness is 6MPa·m -1 / 2 ~9MPa·m -1 / 2 ) and high thermal expansion coefficient (its thermal expansion coefficient is 9×10 -6 K -1 ~11×10 -6 K -1 , matching with high-temperature alloys) and other excellent comprehensive properties, it is currently widely used in thermal barrier coatings for turbine blades of aero-engines and gas turbines. [0003] However, low-quality fuels often contain Na, V impurities that form Na 2 SO 4 and V 2 o 5 and attached to the leaves, Na 2 SO 4 and V 2 o 5 form Na 2 SO 4 -V ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 华云峰王彦峰王宝云李争显杜继红
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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