Fabrication of high thermal conductivity NARloy-Z-diamond composite combustion chamber liner for advanced rocket engines

Biliyar N. Bhat, Sandra E. Greene, Jogender Singh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

NARloy-Z alloy (Cu-3%Ag-0.5%Zr) is a state of the art alloy currently used for fabricating rocket engine combustion chamber liners. Research conducted at NASA-MSFC and Penn State – Applied Research Laboratory has shown that thermal conductivity of NARloy-Z can be increased significantly by adding diamonds to form a composite (NARloy-Z-D). NARloy-Z-D is also lighter than NARloy-Z. These attributes make this advanced composite material an ideal candidate for fabricating combustion chamber liner for an advanced rocket engine. Increased thermal conductivity will directly translate into increased turbopump power and increased chamber pressure for improved thrust and specific impulse. This paper describes the process development for fabricating a subscale high thermal conductivity NARloy-Z-D combustion chamber liner using Field Assisted Sintering Technology (FAST). The FAST process uses a mixture of NARloy-Z and diamond powders which is sintered under pressure at elevated temperatures. Several challenges were encountered, i.e., segregation of diamonds, machining the super hard NARloy-Z-D composite, net shape fabrication and nondestructive examination. The paper describes how these challenges were addressed. Diamonds coated with copper (CuD) appear to give the best results. A near net shape subscale combustion chamber liner is being fabricated by diffusion bonding cylindrical rings of NARloy-Z-CuD using the FAST process.

Original languageEnglish (US)
Title of host publication57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103926
DOIs
StatePublished - 2016
Event57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016 - San Diego, United States
Duration: Jan 4 2016Jan 8 2016

Publication series

Name57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference

Other

Other57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016
CountryUnited States
CitySan Diego
Period1/4/161/8/16

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Architecture
  • Mechanics of Materials

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  • Cite this

    Bhat, B. N., Greene, S. E., & Singh, J. (2016). Fabrication of high thermal conductivity NARloy-Z-diamond composite combustion chamber liner for advanced rocket engines. In 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference (57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2016-1416