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Fabrication of High Pressure Rocket Combustor by Powder Metallurgy

粉末冶金高压火箭燃烧室的制造

基本信息

批准号：
01850151
负责人：
WATANABE Ryuzo
金额：
$ 3.97万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1991
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01850151/
关键词：
Rocket combustor Space shuttle Sintered outer shell Long-life rocket engine Powder Metallurgy Sintering bonding Bonding strength Yound's modulus 軽量合金傾斜機能化レ-ザスペックル法

项目摘要

The processing conditions for the fabrication of high pressure and long life rocket thrust chamber with sintered outer shell were investigated. Powder metallurgical route was selectively employed because of its viability of property control and shape forming. The microstructural control and mechanical property measurements were studied on the alloy systems of of Al-Cu and Cu-Ag for the application to the outer shell of the thrust chamber. The bonding strength of the sintered interface between the outer shell and copper inner shell, as well as net shaping of throat model which simulates the actual rocket thrust chamber. Perticular attention was paid on the control of the porosity of sintered outer shell, which is effective for the lower stiffness of the sintered shell and thus ensures long life use of the rocket engine.The plating of tin or siler was found to be effective for an improved bonding between sintered outer shell and the copper inner throat. A sufficient bonding strength, as well as deffect-free bonding interface, was realized by the control of liquid phase formation and pressurizing during sinter-bonding. The bonding behavior between the outer and inner shell was studied more in datail using a more realistic throat model. Insufficient bonding was often observed at the throat. the shoulder and the edge of the straight part of the model ; which were eliminated by proper conditions of the pressurizing and liquid phase formation.

研究了采用烧结外壳制造高压长寿命火箭推力室的工艺条件。由于粉末冶金工艺具有性能控制和成型的可行性，因此有选择地采用粉末冶金工艺。研究了用于推力室外壳的Al-Cu和Cu-Ag合金体系的显微组织控制和力学性能测试。研究了外壳体与铜内壳烧结界面的结合强度，以及模拟实际火箭推力室的喉道模型的净成形。重点对烧结壳体的孔隙率进行控制，有效降低了烧结壳体的刚度，从而保证了火箭发动机的长寿命使用。镀锡或镀银可以有效地改善烧结后的外壳与铜内喉之间的结合。通过控制烧结过程中液相的形成和加压，实现了足够的结合强度和无缺陷的结合界面。采用更为真实的喉道模型，对内外壳之间的键合行为进行了较为详细的研究。在喉部经常观察到粘结不足。模型的肩部和边缘直部；通过适当的加压和液相形成条件消除了这些缺陷。