液体火箭发动机Cu-Cr-Nb燃烧室内壁制造技术概述

doi:10.11896/cldb.25040075

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Abstract With the growing demand for space launches, increasingly stringent requirements are imposed on the material performance and manufactu-ring processes of the combustion chamber inner wall. These advancements aim to meet the design needs of next-generation liquid rocket engines, which demand high thrust, exceptional reliability, reusability, low cost, and short production cycles. Due to their superior thermal conductivity properties, copper alloys are the preferred material for the inner wall of the combustion chamber. Conventional copper alloys do not meet the stringent stability requirements for materials in high-thrust, reusable rocket engines due to their significant high-temperature softening beha-vior. The Cu-Cr-Nb alloy has emerged as a promising candidate material due to its unique Cr₂Nb precipitate strengthening mechanism and exceptional thermal stability. However, conventional manufacturing processes for this alloy are hindered by low material utilization, high costs, and prolonged production cycles, which significantly prevent its rapid verification and practical application. This paper reviews the development of copper alloys for the inner wall of combustion chambers, with particular emphasis on the key properties of next-generation Cu-Cr-Nb alloys. It systematically presents manufacturing technologies for Cu-Cr-Nb inner wall, including raw material preparation, billet production, conventional machining processes, and additive manufacturing techniques. Finally, future research directions for Cu-Cr-Nb materials and combustion chamber fabrication technologies are discussed.

Key words： liquid rocket engine combustion chamber inner wall copper-chromium-niobium additive manufacturing

Published: Online: 2026-04-16

CLC number:

TG146.1

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	Articles by authors
	XUE Yujie
	MA Mingyue
	YU Gaofeng
	LI Lei
	ZHANG Hang
	WANG Wenbin

Cite this article:

XUE Yujie,MA Mingyue,YU Gaofeng, et al. Overview of Manufacturing Technologies for Cu-Cr-Nb Combustion Chamber Inner Wall in Liquid Rocket Engine[J]. Materials Reports, 2026, 40(7): 25040075-9.

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https://www.mater-rep.com/EN/10.11896/cldb.25040075 OR https://www.mater-rep.com/EN/Y2026/V40/I7/25040075

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