SBIR Phase II: Carbon Fiber/Boron Nitride Matrix Composites: A Unique Low Wear Friction Material

该小型企业创新研究（SBIR）第二阶段项目旨在开发用于各种磨损应用的中型和全尺寸氮化硼（BN）复合材料的测试应用，重点是飞机制动器。这种材料的可行性在第一阶段得到了证明，其中三维针刺碳纤维/C-BN混合基质复合材料与当前的碳纤维/碳基质复合材料（C/C）相比，磨损降低了一个数量级。 该计划是通过商业上可行的技术，即树脂传递模塑工艺，从独特的陶瓷前体聚合物（硼氮烷）制造稳定的氮化硼复合材料。 这种使用BN作为基质的复合材料技术的商业和更广泛的影响似乎提供了解决所需成本性能特性的最佳机会（由于制动器大修减少，原材料成分和维护都减少了）。 此外，这些材料相对于当前飞机制动器的改进性能具有在紧急制动情况下提高乘客安全性的潜力。

This Small Business Innovation Research (SBIR) Phase II project proposes to develop a testing application for intermediate and full scale boron nitride (BN) composites for a wide variety of wear applications with a focus on aircraft brakes. Viability of this material was demonstrated in Phase I where 3-dimensional needled carbon fiber/C-BN hybrid matrix composites displayed an order of magnitude decrease in wear as compared to current carbon fiber/carbon matrix composites (C/C). The plan is to fabricate stable boron nitride composites from a unique pre-ceramic polymer (borazine) through a commercially viable technique, namely resin transfer molding process. The commercial and broader impacts of this technology of a composite using BN as a matrix appears to provide the best opportunity of addressing the desired cost-performance characteristics (both a decrease in raw material components and in maintenance due to fewer brake overhauls). In addition, the improved properties of these materials over current aircraft brakes have the potential to increase passenger safety in emergency braking situations.