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)第二阶段项目建议开发一种用于各种磨损应用的中等和全尺寸氮化硼(BN)复合材料的测试应用，重点是飞机刹车。这种材料的可行性在第一阶段得到验证，其中三维针刺碳纤维/C-BN混杂复合材料的磨损量比目前的碳纤维/碳基复合材料(C/C)降低了一个数量级。该计划是通过一种商业上可行的技术，即树脂传递模塑工艺，以一种独特的预陶瓷聚合物(硼氮化硼)来制造稳定的氮化硼复合材料。使用BN作为基质的复合材料的这项技术的商业和更广泛的影响似乎提供了解决所需的性价比特征的最佳机会(由于较少的刹车大修而减少了原材料组件和维护)。此外，这些材料的性能比目前的飞机刹车更好，有可能在紧急刹车情况下提高乘客的安全性。

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.