公开(公告)号：US20170190143A1

公开(公告)日：2017-07-06

申请号：US14753848

申请日：2015-06-29

申请人： U.S.A. represented by the Administrator of the National Aeronautics and Space Administration

发明人： Jin Ho Kang ,  Cheol Park ,  Godfrey Sauti ,  Michael W. Smith ,  Kevin C. Jordan ,  Sharon E. Lowther ,  Robert G. Bryant

IPC分类号： B32B5/26 ,  F41H5/04 ,  D01D5/38

CPC分类号： B32B5/26 ,  B32B2260/046 ,  B32B2262/0269 ,  B32B2264/107 ,  B32B2307/554 ,  B32B2307/558 ,  B32B2571/02 ,  B82Y30/00 ,  C08J5/005 ,  C08J5/046 ,  C08J2375/04 ,  D01D5/38 ,  D01F1/10 ,  F41H5/0414 ,  F41H5/0442 ,  F41H5/0471 ,  F41H5/0485

摘要： Boron nitride nanotubes (BNNTs), boron nitride nanoparticles (BNNPs), carbon nontubes (CNTs), graphites, or their combinations, are incorporated into matrices of polymer, ceramic or metals. Fibers, yarns, and woven or nonwoven mates of BNNTs are uses as toughening layers in penetration resistant materials to maximize energy absorption and/or high hardness layers to rebound or deform penetrators. They can be also uses as reinforcing inclusions combining with other polymer matrices to create composite layer like typical reinforcing fibers such as Kevlar®, Spectra®, ceramics and metals. Enhanced wear resistance and prolonged usage time, even under harsh conditions, are achieved by adding boron nitride nanomaterials because both hardness and toughness are increased. Such materials can be used in high temperature environments since the oxidation temperature of BNNTs exceeds 800° C. in air. Boron nitride based composite materials are useful as strong structural materials for anti-micrometeorite layers for spacecraft and space suits, ultra strong tethers, protective gear for the human body as well as for vehicles, helmets, shields and safety suits/helmets for industry.