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本报告讨论了一种先进的碳/碳材料的研制及其在固体火箭发动机喷管中的应用。这项研制工作是莫顿·锡奥科尔公司瓦沙奇分部研究与发展计划的一部分。1981年,莫顿·锡奥科尔公司研制的二维碳/碳出口锥成功地通过了试验。但是,这种材料缺乏足够的轴向刚度,并显示出较低的层间强度。因此,进一步研制了一种新的使用整体轴向和径向碳纤维的连续四维编织物。材料的特性试验表明,这种材料具有突出的力学性能:抗拉强度为2.068×10~8Pa,而且有较高的破坏应变和较低的模量。喷管用机械加工方法预制成型,因而制造成本较低,研制投产时间较短而且材料价格便宜。另外,由于排除了人为因素在生产过程中的影响,因而具有较高的可靠性。通过喷管内轮廓上纤维束的定向排列可以得到近似的编织形状和厚度的部件。为1985年静态试验用的整体喉部出/入口锥(ITEC)和常规出口锥构件已经制成。
This report discusses the development of an advanced carbon / carbon material and its application in solid rocket motor nozzles. This development is part of the research and development program at Morton Scholar, Vahesic Division. In 1981, the two-dimensional carbon / carbon outlet cone developed by Morton Theo-Cole successfully passed the test. However, this material lacks sufficient axial stiffness and exhibits lower interlaminar strength. Therefore, a new continuous four-dimensional braid using integral axial and radial carbon fibers was further developed. Material properties tests show that this material has outstanding mechanical properties: tensile strength of 2.068 × 10 ~ 8Pa, but also higher damage strain and lower modulus. The nozzle is prefabricated by mechanical machining, resulting in lower manufacturing costs, shorter development time and lower material costs. In addition, due to the exclusion of human factors in the production process, and therefore has high reliability. An approximate braid shape and thickness of the part can be obtained by the directional arrangement of the fiber bundles on the inner profile of the nozzle. Integral throat exit / inlet cones (ITEC) and conventional exit cone components for static testing in 1985 have been made.