CN111100312B - 聚硅氮烷和碳纤维增强聚合物的层压板 - Google Patents

聚硅氮烷和碳纤维增强聚合物的层压板 Download PDF

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CN111100312B
CN111100312B CN201910999390.0A CN201910999390A CN111100312B CN 111100312 B CN111100312 B CN 111100312B CN 201910999390 A CN201910999390 A CN 201910999390A CN 111100312 B CN111100312 B CN 111100312B
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polysilazane
sheet
cfrp
laminate
perforations
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CN111100312A (zh
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P·J·金伦
R·J·格罗夫
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Boeing Co
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Abstract

公开了包括碳纤维增强聚合物片和聚硅氮烷层的层压板以及制造这种层压板的方法。

Description

聚硅氮烷和碳纤维增强聚合物的层压板
技术领域
本公开涉及包括碳纤维增强聚合物片和聚硅氮烷层的层压板。
背景技术
纤维增强聚合物(FRP)广泛用于创建在航空航天、汽车、船只、体育用品以及土木/结构工程应用等中使用的结构元件和零件。FRP是具有高强度重量比的坚固、轻量的材料。FRP通常通过组合纤维和未固化的粘合聚合物然后固化粘合聚合物来形成。具体类型的FRP是碳纤维增强聚合物(CFRP)。CFRP越来越普遍,并且具有许多不同的应用。
CFRP与金属部件组合用于各种装置中。例如,飞机发动机推力反向器内壁通常采用泡孔芯(通常呈蜂窝结构),以及连接到该芯的CFRP蒙皮。推力反向器壁的CFRP蒙皮通常穿孔,以减少空气流过与推力反向器壁相邻的空腔所产生的噪音。
CFRP也用于组合泡孔芯以制造各种运动用装备。这种装备的示例包括自行车盘轮、滑雪板和滑雪单板。
除非CFRP和金属部件彼此完全电隔离,否则CFRP和金属部件的组合在适当的条件(允许电耦合的条件)下将导致电子从金属流向CFRP,即电腐蚀,或换句话说,金属氧化。
结果,需要保护其中飞机发动机推力反向器中使用的金属部件(例如,铝蜂窝芯材料)电连接或电耦合到CFRP的装置免受由水分引起的氧化。
发明内容
本公开提供了一种对金属部件与CFRP电连通或电流连通的装置中的金属部件的电腐蚀问题的解决方案。该解决方案涉及使用聚硅氮烷或其混合物作为CFRP和/或金属部件与装置周围环境中的氧气或水分之间的阻隔材料。
因此,本公开涉及在CFRP上施加聚硅氮烷涂层,以防止水和氧气接触CFRP内的碳纤维。结果,通过阻止或基本上减少CFRP内或表面处的氧气还原来防止或抑制氧化/还原反应,即CFRP不充当阴极,并且金属部件不充当阳极。因此,金属部件不起阳极的作用,也不会失去电子;简而言之,它不会被氧化并且不会被腐蚀。
作为另选,将聚硅氮烷或其混合物施加到金属部件上,从而通过抑制水和电解质在金属部件和CFRP之间建立电连接或电流连接来防止与CFRP的电流连通。
在一方面,本公开提供了一种层压板,其包括涂覆有聚硅氮烷层的碳纤维增强聚合物(CFRP)片。
在另一方面,本公开提供了一种层压板,其包括碳纤维增强聚合物(CFRP)片,所述片具有第一侧和与第一侧相反的第二侧;以及聚硅氮烷层,该聚硅氮烷层覆盖CFRP片的第一侧。
在另一方面,本公开提供了一种装置,其包括与碳纤维增强聚合物(CFRP)片相邻的金属泡孔芯,所述片具有第一侧和与第一侧相反的第二侧;其中,所述金属泡孔芯涂覆有聚硅氮烷层。
在另一方面,本公开提供了一种用于抑制电连接到碳纤维增强聚合物(CFRP)片的金属结构体的氧化的方法,所述方法包括将液体聚硅氮烷组合物施加到所述CFRP片并使所述组合物固化。
一方面,本公开提供了一种用于抑制与碳纤维增强聚合物(CFRP)片相邻的金属结构体的氧化的方法,所述方法包括将液体聚硅氮烷组合物施加到金属结构体并使所述组合物固化。
附图说明
图1是本公开的层压板的侧剖视图。
图2是本公开的层压板的侧剖视图。
图3a、3b和3c是与金属结构体相邻的层压板的侧剖视图。
图4是具有穿孔的层压板的立体图。
图4a是沿着图4的线A-A通过本公开的层压板中的穿孔截取的侧剖视图。
图5是与金属结构体相邻的具有穿孔的层压板的立体图。
图6是商用飞机喷气动力装置的截面。
图7是推力反向器内壁的等距剖视图。
图8是示出用于抑制电连接到碳纤维增强聚合物(CFRP)片的金属结构体的氧化的示例性方法的流程图。
图9是示出用于抑制与碳纤维增强聚合物(CFRP)片相邻的金属结构体的氧化的示例性方法的流程图。
具体实施方式
如本文所用,“聚硅氮烷”是指在化合物中具有多个Si-N重复单元的低聚物、环状、多环、线性聚合物或树脂状聚合物。
“电连通”和“电流连通”在本文中可互换使用,并且是指材料之间的充分连接以允许电子在材料之间的传输或移动。
本公开解决了金属部件与CFRP电连通或电流连通的装置中金属部件的电腐蚀。术语金属和金属合金在本文中可互换使用。本公开涉及使用聚硅氮烷或其混合物作为CFRP和/或金属部件与装置周围环境中的氧气或水分之间的阻隔材料。
具有连接到CFRP的金属部件的装置很少以将这些部件彼此完全隔离的方式来制造。因此,这些装置中的金属部件易于氧化和腐蚀。例如,一些CFRP片(例如,推力反向器壁蒙皮)的穿孔,具有暴露的碳纤维,这使氧气接触蒙皮内的碳纤维。因此,当例如推力反向器壁的泡孔芯由金属(例如,铝或铝合金)制成并且与CFRP接触时,铝易于氧化和腐蚀。
此外,由于CFRP和金属部件之间存在水和电解质桥接,因此在潮湿或湿润的环境中,氧化和腐蚀增加。电腐蚀过程使铝的腐蚀速率比铝未与CFRP电耦合时正常发生的速率提高100倍以上。
因此,本公开涉及将聚硅氮烷或聚硅氮烷的混合物(通常作为聚硅氮烷在溶剂中的溶液或悬浮液)的涂层施加到CFRP上,并使该涂层固化,从而形成一种防水且具有优异的排水特性的在CFRP上具有聚硅氮烷层的层压板。聚硅氮烷层防止水和氧气接触CFRP中暴露的碳纤维。这进而通过阻止或基本上减少CFRP内或表面的氧气还原来防止CFRP与金属部件之间的氧化/还原反应,即CFRP不充当阴极,并且金属部件不充当阳极。因此,金属部件不会失去电子;简而言之,金属部件不会被氧化并且不会被腐蚀。
作为涂覆CFRP的替代或补充,将聚硅氮烷或其混合物施加到金属部件上,从而通过抑制水和电解质在金属部件和CFRP之间建立电连接或电流连接来防止与CFRP的电流连通。
本公开提供了一种层压板,其包括涂覆有一种或多种聚硅氮烷的碳纤维增强聚合物(CFRP)片。聚硅氮烷涂层可以是单层或多层。聚硅氮烷通常用作液体聚硅氮烷组合物。这些组合物是聚硅氮烷或聚硅氮烷的混合物在载液中的制剂,即,聚硅氮烷在溶剂体系中的溶液或悬浮液。
如图1和图2所示,本公开提供了一种层压板100,其包括碳纤维增强聚合物(CFRP)片102和聚硅氮烷涂层。CFRP片102具有第一侧110和与第一侧相反的第二侧120。该涂层覆盖片102的一侧的至少一部分。
可将聚硅氮烷组合物施加到片的一侧或两侧,使得在固化之后,在片102的一侧或两侧上具有聚硅氮烷涂层。因此,如图1所示,层压板100可包括CFRP片102,该片具有第一侧110和与第一侧相反的第二侧120;以及聚硅氮烷层130,其覆盖片102的第一侧110的至少一部分。这可防止积水和氧化/还原反应。通过将聚硅氮烷施加到片102的两侧,可获得额外的防腐蚀保护。该替代方案示于图2中,其中,CFRP片102具有第一侧110和与第一侧110相反的第二侧120;以及覆盖第一侧110的聚硅氮烷层130和覆盖片102的第二侧120的聚硅氮烷层140。在任一构造中,聚硅氮烷可以覆盖CFRP片102的一侧的一部分,或者优选地覆盖CFRP片102的整侧。最大的耐腐蚀性通过涂覆CFRP片102的整侧来实现。
本公开的层压板可用于其中一个或多个CFRP片与金属或金属合金结构体相邻的装置中。与缺少聚硅氮烷涂层的这种装置相比,所得装置具有改善的耐腐蚀性。
图3a~3c描绘了与金属结构体160相邻的单个层压板100。本公开还包括其中两个以上层压板100与金属结构体160相邻(例如,在金属结构体160的相反侧上)的装置。另外,本公开涵盖其中单个层压板100与两个以上金属结构体160相邻(例如,与第一侧110相邻的第一金属结构体和与第二侧120相邻的第二金属结构体)的装置。
图3a~3c描绘了在片102上具有不同构造的聚硅氮烷的单个层压板100。在图3a中,层压板100在第一侧110上具有聚硅氮烷层130,并且金属结构体160与第二侧120相邻。在图3b中,层压板100在第二侧120上具有聚硅氮烷层140,金属结构体160与第二侧120相邻。在图3c中,层压板100在第一侧110和第二侧120上分别具有聚硅氮烷层130和140,并且金属结构体160与第二侧120相邻。
在以上任一构造中,层压板100可以与金属结构体160电接触或与金属结构体160电绝缘。在许多装置中,难以实现电绝缘,并且如上所述,至少存在一些最小的电连接,其可能导致金属的氧化和腐蚀。聚硅氮烷层或涂层是防水的并且具有优异的排水特性,因此层压板100可以通过防止水同时接触金属结构体160和CFRP片102,和/或通过防止氧气到达片102内的碳纤维,将金属结构体160的腐蚀最小化,进而防止或最小化氧化还原反应(其中CFRP片102将充当阴极,并且金属结构体160将充当阳极)。
尽管图3a~c显示了与第二侧120相邻的金属结构体160,但它可以与层压板100的第一侧110和/或第二侧120相邻。
层压板100的某些用途要求片102具有一个或多个至少部分延伸穿过片102的孔或穿孔。图4中示出了具有多个穿孔170的层压板的示例。如以下更全面解释的,这种层压板可用于制造飞机发动机的零件。
穿孔170的形状和尺寸取决于装置的最终用途。它们可以是多面的、不规则形状的或基本上圆形的。例如,穿孔170的直径可为约0.75mm(0.03英寸)至约1.5mm(0.06英寸),或约1mm(0.04英寸)至约1.25mm(0.05英寸)。
如图4a所示,穿孔170包括穿孔侧壁172。层压板100可以以在穿孔170的侧壁172上形成聚硅氮烷侧壁涂层174的方式制造。侧壁172上的聚硅氮烷侧壁涂层174为CFRP提供额外的防水和排水,从而进一步减少与CFRP接触的金属结构体的腐蚀。
聚硅氮烷侧壁涂层174的厚度可为约1~10μm,约1~5μm或约2~3μm。这种厚度足以实现层压板的减少腐蚀性能,并且仅最小程度地改变穿孔的直径。
金属结构体160可以是金属泡孔芯,优选为蜂窝芯,例如铝蜂窝芯。蜂窝芯用于各种应用,包括飞机和体育用品(例如,自行车盘轮、滑雪板和滑雪单板)。在某些示例中,金属泡孔芯是飞机发动机推力反向器中的金属蜂窝芯。金属蜂窝芯可以是铝或铝合金。
图5描绘了一种装置,其中,金属结构体160是蜂窝芯162,并且蜂窝芯与层压板100相邻。在某些装置中,层压板100和蜂窝芯162彼此物理连接。在一些装置中,层压板100和蜂窝芯162物理连接但彼此电绝缘。作为另选,层压板100可以与蜂窝芯162电接触。如上所述,当层压板100与金属结构体(例如,蜂窝芯162)电接触时,层压板的聚硅氮烷层为金属结构体提供增强的防腐蚀保护。
层压板100的片102在图5中描绘为穿孔的;作为另选,片102没有穿孔。
本公开的层压板特别适用于制造飞机发动机推力反向器的部件。推力反向器壁是一种夹层结构,其具有顶层(通常为环氧树脂浸渍的穿孔碳纤维织物)、蜂窝芯和底层(材料可以为环氧树脂浸渍的碳纤维织物)。
CFRP上的聚硅氮烷涂层或层排斥水并防止氧气还原。当CFRP片和金属结构体是推力反向器壁的部件,并且CFRP片被穿孔时,聚硅氮烷涂层和穿孔的组合使金属在空气流过推力反向器时迅速干燥。这可防止在推力反向器壁上和反向器芯内积水;因此,芯的腐蚀将减少。
如图6所示,典型的商用飞机喷气动力装置201包括发动机202、相连的整流罩203、风机204和推力反向器整流罩205。如风机气流箭头207所示,风机204吸入空气经过动力装置201。风机气流进入整流罩203,并经过推力反向器内壁210和推力反向器外壁212之间的环形风机空气旁通管208。推力反向器内壁210具有内表面214和外表面216。
如图7所示,推力反向器内壁210是夹层结构,其具有穿孔碳纤维、通常为碳纤维增强环氧树脂的顶层320。穿孔322以任何常规方式(例如,当该层在穿孔铺层工具(未示出)上部分固化时)制造到顶层320中。穿孔322设计为保持推力反向器内壁210的适当声学特性。当安装在动力装置201中时,穿孔碳纤维顶层320的顶面324直接与风机气流207相互作用。
穿孔322基本上是圆形的,并且尺寸设定成减小空气流过与推力反向器壁相邻的空腔所产生的噪音。优选的穿孔322的直径为约0.75mm(0.03英寸)至约1.5mm(0.06英寸)。更优选地,穿孔的直径为约1mm(0.04英寸)至约1.25mm(0.05英寸)。
当穿孔覆盖壁210的面积的约1%~20%、约5%~18%或约7%~14%时,可获得最佳的降噪效果。
粘合剂层326通常用于将穿孔碳纤维顶层320粘附到金属(例如,铝或铝合金)蜂窝芯330上。可将粘合剂网状化以便为了声学特性在粘合后保持穿孔,并在片和金属部件之间提供最大的粘附力。合适的粘合剂包括聚酰亚胺和双马来酰亚胺粘合剂材料。
在某些示例中,蜂窝芯330包括铝或铝合金增强片332,其波纹化形成特定的蜂窝单元335,然后用粘合剂树脂333粘合并用相同或不同的树脂(未示出)涂覆。
顶层320涂覆有聚硅氮烷,以在推力反向器内壁210上产生防水和排水层334。因此,壁210是包括CFRP片和聚硅氮烷层的层压板。聚硅氮烷层334的厚度为约1~10μm,约1~5μm或约2~3μm。该厚度最小程度地改变穿孔的直径,从而保持穿孔的降噪特性。
聚硅氮烷层是非常斥水的,并且使CFRP层压板壁210快速排水。快速排水使芯330在空气流过结构体时迅速变干。这可防止在推力反向器壁上和反向器芯内积水;因此,芯的腐蚀将减少。
因为它减少了水介导的对芯的腐蚀,所以层334消除或减少了对顶层320与蜂窝芯330之间的电绝缘层的需要。然而,在某些示例中,可选的电绝缘材料层(未示出)可以位于CFRP片和蜂窝芯之间,以使芯与CFRP层电绝缘。合适的电绝缘材料是玻璃纤维层。
推力反向器外壁212也可以制造成包括如针对内壁210所述的层压板。
例如,通过粘合剂层342将基层338粘附到蜂窝芯330的底面340。基层可以是CFRP或诸如铝或铝合金等金属。
在某些示例中,推力反向器内壁210具有粘附到基层338底部的绝缘层345,其中,当安装在动力装置中时,该绝缘层是与发动机202相邻且最接近的层。
制造本公开的层压板包括将液体聚硅氮烷组合物施加到CFRP片上并使该组合物固化。聚硅氮烷的固化通常在环境温度和压力下进行;加热也可以加速固化。
用于液体聚硅氮烷组合物中的合适的溶剂对聚硅氮烷呈惰性,即,它们充当聚硅氮烷的载体并且不与聚硅氮烷反应。这种溶剂包括烃、C2-C6羧酸的C1-C6烷基酯及其混合物。代表性的烃包括直链或支链C7-C10烃(例如,戊烷、己烷和庚烷)、环状C5-C10饱和烃(例如,环戊烷、环己烷、环庚烷等),以及芳烃(例如,甲苯和二甲苯)。代表性的烷基酯包括乙酸叔丁酯。液体聚硅氮烷组合物还可包含硅烷(例如,3-氨基丙基三乙氧基硅烷)。
在某些示例中,存在于液体聚硅氮烷组合物中的聚硅氮烷的浓度约为组合物的10重量%~50重量%。在其他示例中,存在于液体聚硅氮烷组合物中的聚硅氮烷的浓度约为组合物的10重量%~20重量%。在其他示例中,存在于液体聚硅氮烷组合物中的聚硅氮烷的浓度约为组合物的12重量%~15重量%或13重量%~14重量%。
合适的液体聚硅氮烷组合物包括
Figure BDA0002240807580000081
(例如,
Figure BDA0002240807580000082
1500RC和1500SC)、AGS Tuto
Figure BDA0002240807580000083
以及可从Huntington Specialty Chemicals作为HS-922商购的聚硅氮烷树脂/溶剂共混物。
聚硅氮烷是其中硅和氮原子交替形成基本骨架的聚合物。每个硅原子与两个单独的氮原子结合,并且每个氮原子与两(2)个硅原子结合;因此,出现式[R1R2Si-NR3]n的链和环。R1~R3独立地表示氢原子或有机取代基。典型的有机取代基是具有1~6个碳原子的烷基和不饱和基团(例如,烯丙基和乙烯基)。
当所有的R基团都是氢原子时,该聚合物被称为全氢聚硅氮烷;全氢聚硅氮烷也被称为无机聚硅氮烷,并且可以由式[H2Si–NH]n表示。
当烃取代基与硅原子结合时,该聚合物被称为有机聚硅氮烷。有机聚硅氮烷也被称为有机的聚硅氮烷,并且可以由式[R1R2Si-NH]n表示,其中,R1和R2独立地是氢或烃基,其中R1和R2中至少一个不是氢。优选的R1和R2基团是具有1~6个碳原子的烷基、乙烯基和烯丙基。
在美国专利4,395,460和6,329,487号中公开了适用于本文的聚硅氮烷。
美国专利4,395,460号中公开的聚硅氮烷可以通过在惰性、基本上无水的气氛中,在25℃至370℃的温度下使以下材料接触并反应来制备:
(A)氨,和
(B)选自由以下组成的组中的含氯乙硅烷:
(i)具有通式[ClaRbSi]2的含氯乙硅烷
(ii)具有通式[ClcRdSi]2的含氯乙硅烷的混合物
其中
a的值为1.5~2.0;
b的值为1.0~1.5;
c与d之比为1:1至2:1。
a+b的总和等于三;
c+d的总和等于三;并且
在每种情况下的R选自由乙烯基、1~3个碳原子的烷基和苯基组成的组。
在美国专利6,329,487号中公开的聚硅氮烷可以通过以下制备:
a)将至少一种具有至少一个Si-H键的卤代硅烷引入液体无水氨中,液体无水氨的量至少是卤代硅烷上硅-卤键的化学计量比量的两倍,该卤代硅烷与无水液氨反应形成前体氨解产物和卤化铵盐或其酸,卤化铵盐或其酸在无水液氨中溶解并电离,从而提供酸性环境;并且
b)将前体氨解产物在酸性环境中保持足够的时间,从而相对于从步骤(a)的卤代硅烷并入新型硅氮烷和/或聚硅氮烷中的Si-H键的数量,减少Si-H键的数量。
用于在CFRP片上形成聚硅氮烷层的聚硅氮烷可以是无机聚硅氮烷、有机聚硅氮烷或其混合物。在一些示例中,聚硅氮烷是无机聚硅氮烷或其混合物。
在其他示例中,聚硅氮烷是有机聚硅氮烷或其混合物。
在制造如本文所公开的层压板期间,可将液体聚硅氮烷组合物以在聚硅氮烷固化时产生具有任何所需厚度的聚硅氮烷层的厚度施加到CFRP片。聚硅氮烷层的优选厚度为约1~10μm、约1~5μm或约2~3μm。这种厚度足以创建足够的水和氧气屏障,而不会堵塞或以其他方式改变存在于CFRP片中的任何穿孔的直径。提供这种层厚度的合适的施加比率为约5~15mL/m2
尽管已经描述了特定的实施情形,但对于本公开所属领域的技术人员将显而易见的是,在不脱离精神和范围的情况下,可以对其进行许多修改和变化。
因此,本公开的范围应被视为仅局限于所附权利要求的要素或其合理等同物的精神和范围。
第1条.一种层压板,其包括:碳纤维增强聚合物(CFRP)片,所述片具有第一侧和与第一侧相反的第二侧;以及聚硅氮烷层,该聚硅氮烷层覆盖所述CFRP片的第一侧和/或第二侧。
第2条.根据第1条所述的层压板,其中,所述CFRP片的第一侧包含穿孔。
第3条.根据第1条或第2条所述的层压板,其中,所述CFRP片的第一侧和第二侧中的至少一个与金属电连通。
第4条.根据第2条所述的层压板,其中,所述片的第一侧和第二侧中的至少一个与金属泡孔芯或金属合金泡孔芯电连通。
第5条.根据第2~4条中任一条所述的层压板,其中,所述穿孔的直径为约0.75mm(0.03英寸)至约1.5mm(0.06英寸)。
第6条.根据第2~5条中任一条所述的层压板,其中,所述穿孔的侧壁涂覆有聚硅氮烷。
第7条.根据第1~6条中任一条所述的层压板,其中,所述聚硅氮烷层的厚度为约1~10μm。
第8条.根据第2~7条中任一条所述的层压板,其中,所述穿孔覆盖所述片的第一侧的约5%~20%。
第9条.根据第1~8条中任一条所述的层压板,其中,所述聚硅氮烷是无机聚硅氮烷、有机聚硅氮烷或其混合物。
第10条.根据第1~9条中任一条所述的层压板,其中,所述CFRP片包括暴露的碳纤维。
第11条.根据第1~10条中任一条所述的层压板,其中,所述金属泡孔芯包括铝。
第12条.一种飞机发动机推力反向器,其包括根据第1-11条中任一条所述的层压板。
第13条.一种用于抑制电连接到碳纤维增强聚合物(CFRP)片的金属结构体的氧化的方法,其中,所述CFRP片具有第一侧和第二侧,并且第二侧与所述金属结构体电连通,所述方法包括将液体聚硅氮烷组合物施加到所述CFRP片的至少第一侧上并使所述组合物固化。
第14条.根据第13条所述的方法,其中,所述液体聚硅氮烷组合物包括无机聚硅氮烷、有机聚硅氮烷或其混合物。
第15条.根据第13条或第14条所述的方法,其中,所述液体聚硅氮烷组合物包括聚硅氮烷和对所述聚硅氮烷呈惰性的溶剂的溶液。
第16条.根据第15条所述的方法,其中,所述溶剂选自烃、C2-C6羧酸的C1-C6烷基酯及其混合物。
第17条.根据第13~16条中任一条所述的方法,其中,存在于所述液体聚硅氮烷组合物中的聚硅氮烷的浓度约为所述组合物的10重量%~50重量%。
第18条.根据第13~16条中任一条所述的方法,其中,存在于所述液体聚硅氮烷组合物中的聚硅氮烷的浓度约为所述组合物的10重量%~20重量%。
第19条.根据第13~18条中任一条所述的方法,其中,将所述液体聚硅氮烷以在所述聚硅氮烷固化时产生厚度为约1~10μm的聚硅氮烷层的厚度施加到第一侧。
第20条.根据第13~19条中任一条所述的方法,其中,将所述液体聚硅氮烷以约5~15mL/m2的比率施加到第一侧。
已经参照以上其具体实例进行了详细说明,从本公开将明白的是,在不脱离所附权利要求中所限定的范围的情况下,可以进行修改和变化。更具体地,尽管本文将一些方面确认为特别有利,但设想的是,本公开不必局限于这些特定方面。

Claims (16)

1.一种层压板(100),其包括:碳纤维增强聚合物(CFRP)片(102),所述片具有第一侧(110)和与第一侧相反的第二侧(120);以及聚硅氮烷层(130),所述聚硅氮烷层(130)覆盖所述CFRP片(102)的第一侧(110)和/或第二侧(120),
其中,所述CFRP片(102)的第一侧(110)包含多个穿孔(170),所述穿孔(170)中的一个或多个延伸穿过所述片(102);
其中,所述片(102)的第一侧(110)和第二侧(120)中的至少一个与金属泡孔芯(160)或金属合金泡孔芯(160)电连通;并且
其中,所述穿孔的侧壁(172)涂覆有聚硅氮烷(174)。
2.根据权利要求1所述的层压板(100),其中,所述穿孔(170)的直径为0.75mm(0.03英寸)至1.5mm(0.06英寸)。
3.根据权利要求1所述的层压板(100),其中,所述聚硅氮烷层(174)的厚度为1~10μm。
4.根据权利要求3所述的层压板(100),其中,所述穿孔(170)覆盖所述片(102)的第一侧(110)的5%~20%。
5.根据权利要求4所述的层压板(100),其中,所述聚硅氮烷是无机聚硅氮烷、有机聚硅氮烷或其混合物。
6.根据权利要求5所述的层压板(100),其中,所述CFRP片(102)包括暴露的碳纤维。
7.根据权利要求1所述的层压板(100),其中,所述金属泡孔芯(160)包括铝。
8.一种飞机发动机推力反向器(205),其包括根据权利要求1所述的层压板(100)。
9.一种用于抑制电连接到碳纤维增强聚合物(CFRP)片(102)的金属结构体的氧化的方法,其中,所述CFRP片(102)具有第一侧(100)和第二侧(120),并且第二侧(120)与所述金属结构体电连通,所述方法包括将液体聚硅氮烷组合物施加到所述CFRP片(102)的至少第一侧(110)上并使所述组合物固化,
其中,所述CFRP片(102)的第一侧(110)包含多个穿孔(170),所述穿孔(170)中的一个或多个延伸穿过所述片(102);并且
其中,所述穿孔的侧壁(172)涂覆有聚硅氮烷(174)。
10.根据权利要求9所述的方法,其中,所述液体聚硅氮烷组合物包括无机聚硅氮烷、有机聚硅氮烷或其混合物。
11.根据权利要求9所述的方法,其中,所述液体聚硅氮烷组合物包括聚硅氮烷和对所述聚硅氮烷呈惰性的溶剂的溶液。
12.根据权利要求11所述的方法,其中,所述溶剂选自烃、C2-C6羧酸的C1-C6烷基酯及其混合物。
13.根据权利要求12所述的方法,其中,存在于所述液体聚硅氮烷组合物中的聚硅氮烷的浓度为所述组合物的10重量%~50重量%。
14.根据权利要求12所述的方法,其中,存在于所述液体聚硅氮烷组合物中的聚硅氮烷的浓度为所述组合物的10重量%~20重量%。
15.根据权利要求13所述的方法,其中,将所述液体聚硅氮烷以在所述聚硅氮烷固化时产生厚度为1~10μm的聚硅氮烷层(130)的厚度施加到第一侧(110)。
16.根据权利要求15所述的方法,其中,将所述液体聚硅氮烷以5~15mL/m2的比率施加到第一侧(110)。
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