To evaluate the ablation/erosion resistance of the silicone rubber composites, a new method based on multi-phase flow produced by oxygen–kerosene ablation test device was put forward and a new kind of particle was applied in the test. The phase transition characteristics of B₂O₃ particles and Al₂O₃ particles in high-temperature flame jet were investigated and compared. On this basis, the ablation tests of silicone rubber composites under the erosion of particles were carried out. The results show that erosion of particles is an important factor in ablation. Compared with Al₂O₃ particle, B₂O₃ particle melts, evaporates and forms the liquid coating in the oxygen–kerosene flame jet, which can be used to simulate condensed phase particle in rocket engine. After the multi-phase flow ablation test ablation condition with B₂O₃ particles, the ablation rates are relatively small and reasonably, and a small ablation pit is formed on the surface of the silicone rubber composites. In the profile of ablated materials, a multi-layer structure with char layer, pyrolysis layer and matrix is formed. In the process of particle impact, the melting layer on the surface of B₂O₃ alleviates the impact force, thereby reducing the erosion of particles. The feasibility and scientificity of the new method based on multi-phase with B₂O₃ particles used for ablation resistance of silicone rubber composites investigation is validated.

中文翻译：

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研究基于多相流的硅橡胶复合材料烧蚀/腐蚀性能的新方法

为了评估硅橡胶复合材料的耐烧蚀/抗冲蚀性能，提出了一种基于氧-煤油烧蚀试验装置产生的多相流的新方法，并在该试验中应用了一种新型的颗粒。研究并比较了高温火焰喷射中B ₂ O ₃颗粒和Al ₂ O ₃颗粒的相变特性。在此基础上，进行了颗粒侵蚀下硅橡胶复合材料的烧蚀试验。结果表明，颗粒腐蚀是烧蚀的重要因素。与Al ₂ O ₃颗粒相比，B ₂ O ₃粒子在氧气-煤油火焰射流中熔化，蒸发并形成液体涂层，可用于模拟火箭发动机中的凝结粒子。在用B ₂ O ₃颗粒进行多相流烧蚀试验烧蚀条件后，烧蚀率相对较小且合理，并且在硅橡胶复合材料的表面上形成小的烧蚀坑。在烧蚀材料的轮廓中，形成具有炭层，热解层和基质的多层结构。在粒子撞击的过程中，B ₂ O ₃表面的熔化层减轻了撞击力，从而减少了粒子的侵蚀。基于B ₂多相的新方法的可行性和科学性验证了用于硅橡胶复合材料耐烧蚀性的O ₃颗粒。