Multifunctional nanocellular single crystal nickel for turbine applications

Patent metadata

Field	Value
Publication number	US-10508360-B2
Application number	US-201514600029-A
Country	US
Kind code	B2
Filing date	Jan 20, 2015
Priority date	Jan 20, 2015
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

A nanocellular single crystal nickel based material is provided having a thermal diffusivity in the range of 0.0002 cm{circumflex over ( )}2/s to 0.02 cm{circumflex over ( )}2/s and a thermal conductivity in the range of 0.024 W/mK to 9.4 W/mK. The nanocellular single crystal nickel based material may be used to form turbine engine components. The nanocellular single crystal nickel based material may be produced by providing a first solution containing a nickel precursor and deionized water, providing a second solution containing a structure controlling polymer/surfactant and an alcohol, mixing the first and second solutions into a solution containing a reducing agent to form a third solution, and processing the third solution to create the nanocellular single crystal based material.

First claim

What is claimed is:

1. A process for manufacturing a nanocellular single crystal based material comprising steps of:
providing a first solution containing a nickel precursor in deionized water;
providing a second solution containing a structure controlling polymer or a surfactant and an alcohol;
mixing said first and second solutions into a solution containing a reducing agent to form a third solution; and processing said third solution to create the nanocellular single crystal based material; wherein said processing comprises stirring said third solution at a temperature in a range of 100° C. to 130° C. for a time period in a range of 5.0 minutes to 15 minutes;
removing sol from said stirred third solution and then centrifuging said third solution at a speed of 2000 rpm to 5000 rpm for a time in a range of 5.0 min. to 15 min;
removing sol from said centrifuged third solution and leaving a product of the nanocellular single crystal based material;
washing said nanocellular single crystal based material in a washing solution containing an alcohol and deionized water to remove soluble inorganic salts and organic solvents from the nanocellular single crystal based material, subjecting the washing solution to sonication for a time period in the range of 5.0 to 15 min., and then performing a filtration step to remove the washing solution from the nanocellular single crystal based material; wherein the nanocellular single crystal based material comprises pores and ligaments in the range of 0.05 to 100 microns.

2. The process of claim 1 , wherein said nickel precursor comprises a nickel nitrate hexahydrate.

3. The process of claim 1 , wherein said second solution comprises said surfactant comprising polyvinyl pyrrolidine and said alcohol comprising ethylene glycol.

4. The process of claim 1 , wherein said reducing agent comprises hydrazine.

5. The process of claim 1 , further comprising adding at least one additive selected from the group consisting of aluminum, cobalt, chromium, tungsten, rhenium, tantalum, hafnium, yttrium, and zirconium to one of said solutions.

6. The process of claim 1 , wherein the nanocellular single crystal based material comprises a nanoporosity with pores having a size ranging from 50 nm to 25 microns.

7. The process of claim 6 , wherein said pores have a size in the range of 50 nm to 6.0 microns.

Assignees

• United Technologies Corp

Inventors

• Birnkrant Michael J
• Li Weina

Classifications

• F05D2300/606

  Directionally-solidified crystalline structures · CPC title

• F01D5/183

  Blade walls being porous · CPC title

• C30B29/52

  Alloys · CPC title

• F05D2300/514

  Porosity · CPC title

• C30B29/02

  Elements · CPC title