CN114746254A - 具有改善的耐磨性的部件 - Google Patents
具有改善的耐磨性的部件 Download PDFInfo
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Abstract
本申请涉及由有机基质复合材料制成的部件(1),其在其表面(S)上具有包含含有聚四氟乙烯颗粒(22)的树脂(24)的耐磨区域(20)。
Description
技术领域
本发明涉及一种由有机基质复合材料(“有机基质复合物”;“OMC”)制成的部件以及该部件的制造,该部件具有改善的耐磨性。
背景技术
有机基质复合物通常在部件相互摩擦接触的条件下使用。具有有机热固性或热塑性基质的结构复合物的常用基质的摩擦系数相对较高。操作中遇到的接触和摩擦会产生显著的发热和磨损。
已知在聚合物基体中引入碳填料,但是即使采用这种解决方案,所获得的部件的摩擦系数仍可能保持较高。因此该解决方案提供的耐磨性可以进一步改善。
因此,需要有改善由有机基质复合材料制成的部件的耐磨性而同时保持这些部件的简单制造并且不会导致它们的体积增加的解决方案。
发明内容
本发明涉及由有机基质复合材料制成的部件,其在其表面上具有包含含有聚四氟乙烯颗粒的树脂的耐磨区域。
与现有技术中提出的碳填料的引入相比,本发明的部件的耐磨区域具有减小的动摩擦系数,并且为部件提供了耐磨性的显著改进。此外,本发明的解决方案可以保持部件的相对简单的制造并且不会导致其体积增加,部件的几何形状和尺寸没有显著改变。特别地,本发明使得可以放弃使用通过与部件结合而添加和组装的金属磨损元件,该解决方案会导致更复杂的制造以及操作中不相适应的不同膨胀。
在一个示例性实施方式中,耐磨区域中的聚四氟乙烯颗粒的质量含量为5%-65%,例如10%-60%。
这样的含量有利地帮助进一步改善耐磨性,同时避免改变复合材料部件的性能的任何风险。
在一个示例性实施方式中,聚四氟乙烯颗粒的中值尺寸为0.1μm-50μm,或甚至为0.5μm-50μm或0.1μm-10μm,或甚至为0.5μm-5μm。
除非另外说明,否则“中值尺寸”应当指统计学粒度分布给出的群的半数的尺寸,称为D50。
在一个示例性实施方式中,部件为涡轮机部件,例如航空涡轮机部件。部件例如可以是反推力装置的活动罩(“transcowl”)或风扇的罩(“fancowl”)。
本发明还涉及一种组件,其包含上述第一部件和与第一部件分开的第二部件,其与第一部件的耐磨区域接触。
在使用过程中,第一和第二部件旨在在耐磨区域上相互摩擦接触。根据一个示例,第二部件可以具有上述结构,即可以由有机基质复合材料制成,并且在其表面上具有包含第二树脂的第二耐磨区域,其含有第二聚四氟乙烯颗粒,第一部件的耐磨区域与第二耐磨区域接触。
本发明还涉及包含上述组件的涡轮机。
本发明还涉及用于制造上述部件的方法,其至少包括:
-在由有机基质复合材料制成的基材的表面上形成包含流体态的树脂和聚四氟乙烯颗粒的层,以及
-在基材上固化流体态的树脂,从而形成耐磨区域并获得复合材料部件。
也可以在形成包含流体态的树脂和聚四氟乙烯颗粒的层之前对基材进行已知的表面处理。根据一个示例,可以在顶部形成所述层之前在基材上定位纤维织构和任选的粘合剂。
替代地,根据第一实施方式,该方法为用于制造上述部件的方法,其至少包括:
-在用流体基质组合物预浸渍的纤维结构的表面上形成包含流体态的树脂的层,其含有聚四氟乙烯颗粒,以及
-将流体态的树脂与流体基质组合物共同固化,从而形成耐磨区域并获得复合材料部件。
替代地,根据第二实施方式,该方法为用于制造上述部件的方法,其至少包括:
-在纤维结构的表面上形成包含流体态的树脂的层,其含有聚四氟乙烯颗粒,
-在所述纤维结构的孔中引入流体基质组合物,以及
-将流体态的树脂与引入的流体基质组合物共同固化,从而形成耐磨区域并获得复合材料部件。
在上述两种方法的情况下,共同固化可以通过树脂与基质组合物的共同交联(共交联)来实现。当树脂和基质组合物为热固性时就是这种情况。之后可以通过共同固相化来进行共同固化,而无需树脂与基质组合物的交联。当树脂和基质组合物为热塑性时就是这种情况。
附图说明
图1示意性显示了本发明的示例性部件的剖面。
图2示意性显示了本发明的示例性组件的剖面。
图3显示了本发明的部件的第一示例性制造方法的第一步之后获得的产品。
图4显示了本发明的部件的第一示例性制造方法的第二步之后获得的产品。
图5显示了本发明的部件的第二示例性制造方法的第一步之后获得的产品。
图6显示了本发明的部件的第二示例性制造方法的第二步之后获得的产品。
图7显示了本发明的部件的第三示例性制造方法的第一步之后获得的产品。
图8显示了本发明的部件的第三示例性制造方法的第二步之后获得的产品。
图9显示了本发明的部件的第三示例性制造方法的第三步之后获得的产品。
图10为对比测试结果,其显示了本发明的部件与本发明以外的部件的动摩擦系数的不同。
图11为对比测试结果,其显示了本发明的部件与本发明以外的部件的动摩擦系数的不同。
图12为对比测试结果,其显示了本发明的部件与非本发明的部件在摩擦测试之后的磨损量的不同。
具体实施方式
图1显示了本发明的部件1的一个示例。部件1由有机基质复合材料制成,其包含有机基质致密化的纤维增强件。有机基质存在于纤维增强件的孔中并覆盖和粘合该增强件的纤维。纤维增强件和有机基质的结合形成有机基质复合材料,其由图1-4中的符号10表示。
纤维增强件可以具有各种结构。举例来说,纤维增强件可以由纤维织构的堆叠物(例如二维织物或单向层)或者由通过三维编织获得的织物形成。形成纤维增强件的纤维可以是碳纤维、不同于碳的陶瓷材料的纤维(例如碳化硅或氧化铝)、玻璃纤维或聚合物纤维。
部件1的有机基质可以是固态的热塑性聚合物或聚合态和固态的热固性聚合物。举例来说,有机基质可以是环氧树脂基质、聚氨酯基质、聚酰胺基质、聚醚酰亚胺基质(PEI)或聚醚醚酮基质(PEEK)。
部件1在其表面S上具有耐磨区域20,其包含含有聚四氟乙烯颗粒22的树脂24。总体而言,出于可读性的原因,图中该区域20的尺寸被放大了。下文中,出于简洁性的原因,除非特别提及,否则术语“聚四氟乙烯颗粒”表述为“PTFE颗粒”或“颗粒”,而术语”耐磨区域”表述为“区域”。树脂24构成固体基质,其含有颗粒22。区域20的动摩擦系数可以小于或等于0.1,例如小于或等于0.06。动摩擦系数可以通过带负荷交变摩擦测试法进行测定。
区域20是部件1的表面部分,其位于部件1的外表面S与其纤维增强件之间。区域20可以与部件1的纤维增强件的纤维接触。特别地,颗粒22可以与纤维增强件的纤维接触和/或插入这些纤维之间。替代地,区域20可以通过部件1的有机基质与纤维增强件的纤维分开。
区域20的厚度e10可以小于或等于0.5mm,例如为0.01mm-0.3mm。
区域20界定部件1的外表面S,并且在使用过程中旨在和与部件1分开的第二部件接触并摩擦。图2显示了该方面,其中,第二部件2与部件1的区域20接触。部件1与第二部件2旨在在使用过程中摩擦接触(表示为箭头F)。应注意,第二部件2中与区域20接触的摩擦表面可以具有或不具有与区域20相同类型的耐磨区域。
在图1的示例中,PTFE颗粒22选择性地位于区域20中,即仅存在于部件1的表面,而不存在于区域20所覆盖的整个复合材料10中。但是,若颗粒22同时存在于部件1的表面和区域20所覆盖的整个复合材料10中,也不脱离本发明的范围。因此,根据一个示例,PTFE颗粒可以纳入部件1的有机基质中。
树脂24可以在固态下具有热塑性或在聚合态和固态下具有热塑性。树脂24可以是有机树脂。树脂24可以与有机基质相同或不同。举例来说,树脂24可以是环氧树脂、聚氨酯树脂、聚酰胺树脂、聚醚酰亚胺树脂或聚醚醚酮树脂。
区域20中PTFE颗粒的质量含量可以大于或等于5%,例如大于或等于10%。区域20中PTFE颗粒的质量含量可以是5%-65%,例如为10%-60%。
PTFE颗粒的中值尺寸可以大于或等于0.1μm,例如大于或等于0.5μm。PTFE颗粒的中值尺寸可以小于或等于50μm,例如小于或等于10μm,例如小于或等于5μm,例如小于或等于2μm。PTFE颗粒的中值尺寸可以是0.1μm-50μm,例如为1μm-50μm或0.1μm-10μm,例如为1μm-10μm或0.1μm-5μm,例如为1μm-5μm或0.1μm-2μm,例如为1μm-2μm。PTFE颗粒可以为细粒、原纤维或原纤维束的形式。在原纤维或束的形式下,最大长度可以达到0.05mm。
举例来说,可用的PTFE颗粒可以包括西格玛·奥尔德里奇公司(Sigma-Aldrich)销售的参考号为430935-100g的PTFE颗粒(中值粒径为1微米)。
区域20中树脂的质量含量可以大于或等于35%,例如大于或等于40%。区域20中树脂的质量含量可以是35%-95%,例如为35%-90%或40%-95%,例如为40%-90%。
对本发明的部件的结构的一个示例进行说明后,现参照图3-9对几种制造方法进行说明。
图3和4显示了本发明的第一示例性制造方法的两步过程中获得的产品。在该示例中,区域20形成于有机基质复合材料制成的基材10上,其制造先前已经完成。基材10的有机基质先前已经固化。在热固性基质的情况下,基材10的有机基质处于聚合态。例如,该变体可以对在使用期间与第二部件2发生磨损的基材10进行修复的情况下或者在制造要首次使用的部件(处于新状态的部件)的情况下实施。
首先,形成图3所示的产品,其具有由有机基质复合材料制成的基材10和包含含有PTFE颗粒22的流体态的树脂23的层,该层存在于基材10的表面S1上。该层可以与基材10的表面S1接触。该层包含流体树脂23和颗粒22,可以通过不同方式形成。
根据一个示例,树脂23可以在流体态下直接沉积于表面S1上,其具有或不具有颗粒22。因此,可以将混合物中包含颗粒22的流体态的树脂23直接沉积于基材10的表面S1上,或者先将流体态的树脂23沉积于基材10上,再沉积颗粒22,或者先沉积颗粒22,再沉积流体态的树脂23。
根据一个替代方案,树脂可以以固体形式沉积于表面S1上,例如以包含颗粒22的膜形式)或以包含树脂颗粒和颗粒22的粉末混合物形式。在树脂在固态下沉积于表面S1上的情况下,实施将沉积在基材10上的该树脂流体化的步骤(例如通过加热),以获得图3所示的产品。在形成包含流体树脂23和颗粒22的层之前,例如可以通过打磨和/或喷砂(等离子体、电晕、激光等)对基材10的表面进行初步处理。该初步表面处理可以导致基材10的纤维增强件的一些纤维在表面暴露,使得流体树脂23和颗粒22之后与这些暴露的纤维接触。
在第二步中,实施流体树脂23的固化。该固化可以通过冷却图3的产品来进行,因此当树脂是热塑性树脂时能够使其冷冻,或者当涉及热固性树脂时通过树脂23的聚合来进行。这种聚合可以通过加热来活化。在该固化之后,形成区域20并获得图4所示的复合材料部件。区域20与下面的基材10的粘合可以通过预先沉积在基材10的表面上的粘合剂粘合和/或通过流体树脂23渗透到基材的表面孔中而形成多个锚点来进行。该粘合也可以通过下面的基材局部熔化后冷却来进行,从而使基材10和区域20能够共同冷冻,特别是在热塑性有机基质的情况下。
还应注意,为了获得区域20和要获得的部件1的所需尺寸,可以在其固化结束之前进行压实流体树脂23的步骤。如图所示,该压实步骤使得可以从包含图3所示厚度为e1的流体树脂23的层穿到厚度为e10(其小于e1,例如小于或等于90%的e1)的区域20,如图4所示。
刚刚描述的图3和4的情况涉及通过在有机基质复合材料制成的基材上形成区域20来制造部件,基材的制造已经预先完成。现在将结合图5-9对树脂和颗粒在完成有机基质复合材料的制造之前沉积的情况进行说明。
因此,图5和6显示了用于制造本发明的部件的第二示例性方法。该示例涉及首先在预浸渍有流体基质组合物40的纤维结构的表面S2上形成包含含有颗粒22的流体树脂23的层。纤维结构旨在形成要获得的复合材料部件的纤维增强件。基质组合物40旨在形成要获得的复合材料部件的有机基质。在所示示例中,纤维结构由浸渍有基质组合物40的纤维层30的堆叠物形成,该基质组合物可以是热塑性或热固性有机聚合物。替代地,可以使用通过三维编织形成的纤维结构。
以与结合图3和图4所示类似的方式,树脂23和颗粒22可以直接、以混合物或分别、以及以流体态或固态沉积。
之后,可以对图5的产品进行热处理,以将基质组合物40和树脂23(在两种热固性聚合物的情况下)共聚,以获得包含有机基质复合材料110的部件,其在其表面S上具有区域20(图6)。根据一个替代方案,在热塑性聚合物的情况下,可以进行冷却以将树脂23和基质组合物40共同固化并获得复合材料部件。
如上所述,可以在共同固化结束之前进行压实,从而将区域20的厚度减小到小于包含流体树脂23的层的厚度e1的厚度e10。压实可以获得具有厚度e20的有机基质复合材料110,其小于浸渍有基质组合物40的纤维结构的厚度e2,例如小于或等于e2的90%。
但是,本发明不限于在预浸渍有基质组合物的结构上形成流体树脂层。实际上,图7-9的制造替代方案开始于在干燥纤维结构(未预浸渍)的表面S3上形成包含流体树脂23和颗粒22的层。在形成该层之后,将流体基质组合物40引入纤维结构中。应注意,可以在引入基质组合物40之前或之后进行压实。基质组合物40的引入可以通过注射或输注进行。之后,如上所述通过共聚或共同冷却进行基质组合物40和树脂23的共同固化。
以上结合图1的部件描述的特征适用于在所描述的各种制造示例中获得的部件。
现在将结合图10-12描述本发明的部件的性能。这些图提供了本发明的部件与本发明以外的部件之间的对比测试结果。评价的部件是由有机基质复合材料制成的部件,其在其表面上具有含有大于20质量%的不同类型的颗粒的树脂(在表面树脂层中为30-60质量%)。所含有的颗粒的中值尺寸为约1μm。在这些图中,“R”表示在其表面不具有颗粒的碳/环氧树脂复合物,而“1”表示在其表面具有PTFE颗粒的本发明的部件的结果。符号“2”到“5”是在其表面具有各种PTFE颗粒的复合物。
图10展示了实验结果,其显示了在进行测试期间动摩擦随时间的变化。进行的测试包括在恒定压缩力下的交变运动。
可以看出,在摩擦测试期间,包含PTFE颗粒的本发明的部件显示出比测试的其他复合材料部件低得多的动摩擦系数。图11显示,本发明的部件在测试中具有接近0.05的平均动摩擦系数,这远低于所评估的其他部件的平均动摩擦系数,其大于0.3。图12显示了测试结束时获得的所评估的产品在摩擦接触中的表面磨损的结果。可以看出,在测试期间针对压缩变形的体积进行校正后,本发明的部件是具有最小磨损量的部件。
表述“在……与……之间”应理解为包括界限。
Claims (11)
1.一种组件,其包含第一部件(1)和与第一部件分开的第二部件(2),第一和第二部件旨在摩擦接触,
第一部件由有机基质复合材料制成,其在其表面(S)上具有包含含有聚四氟乙烯颗粒(22)的树脂(24)的耐磨区域(20),第二部件由有机基质复合材料制成,其与第一部件的耐磨区域(20)接触。
2.如权利要求1所述的组件,其中,第一部件(1)在耐磨区域(20)中的聚四氟乙烯颗粒(22)的质量含量为5%-65%。
3.如权利要求2所述的组件,其中,第一部件(1)在耐磨区域(20)中的聚四氟乙烯颗粒(22)的质量含量为10%-60%。
4.如权利要求1-3中任一项所述的组件,其中,第一部件(1)的聚四氟乙烯颗粒(22)的中值尺寸为0.1μm-50μm。
5.如权利要求4所述的组件,其中,第一部件(1)的聚四氟乙烯颗粒(22)的中值尺寸为0.5μm-50μm。
6.如权利要求1-5中任一项所述的组件,其中,第一部件(1)为涡轮机部件。
7.如权利要求1-6中任一项所述的组件,其中,第二部件(2)在其表面上具有第二耐磨区域,其包含含有第二聚四氟乙烯颗粒的第二树脂,第一部件的耐磨区域与第二耐磨区域接触。
8.一种涡轮机,其包含如权利要求1-7中任一项所述的组件。
9.一种用于制造如权利要求1-7中任一项所述的组件的方法,其至少包括:
-在由有机基质复合材料制成的基材(10)的表面(S1)上形成包含流体态的树脂(23)和聚四氟乙烯颗粒(22)的层,
-在基材上固化流体态的树脂,从而形成耐磨区域(20)并获得由复合材料制成的第一部件(1),以及
-使由此获得的第一部件的耐磨区域与第二部件(2)接触。
10.一种用于制造如权利要求1-7中任一项所述的组件的方法,其至少包括:
-在用流体基质组合物(40)预浸渍的纤维结构(30)的表面(S2)上形成包含流体态的树脂(23)的层,其含有聚四氟乙烯颗粒(22),和
-将流体态的树脂和流体基质组合物共同固化,从而形成耐磨区域(20)并获得由复合材料制成的第一部件(1),以及
-使由此获得的第一部件的耐磨区域与第二部件(2)接触。
11.一种用于制造如权利要求1-7中任一项所述的组件的方法,其至少包括:
-在纤维结构的表面(S3)上形成包含流体态的树脂(23)的层,其含有聚四氟乙烯颗粒(22),
-在所述纤维结构(30)的孔中引入流体基质组合物(40),
-将流体态的树脂和引入的流体基质组合物共同固化,从而形成耐磨区域(20)并获得由复合材料制成的第一部件(1),以及
-使由此获得的第一部件的耐磨区域与第二部件(2)接触。
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US (1) | US11867073B2 (zh) |
EP (1) | EP4058276A1 (zh) |
CN (1) | CN114746254A (zh) |
FR (1) | FR3102948B1 (zh) |
WO (1) | WO2021094672A1 (zh) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2322095A (en) * | 1997-02-13 | 1998-08-19 | Ctp Davall Limited | Moulded parts used as power and/or motion transmission components |
US20110002779A1 (en) * | 2008-12-24 | 2011-01-06 | Laurent Schuster | Method for Manufacturing by Molding a Machine Structural Element Having an Abradable Surface, and Structural Element |
US20180258241A1 (en) * | 2017-03-10 | 2018-09-13 | Celanese Sales Germany Gmbh | Polyester Polymer Compositions |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2124111B1 (es) * | 1994-11-15 | 1999-08-16 | Sintermetal Sa | Conjunto de embolo y guia de su vastago para amortiguadores hidraulicos. |
WO2004094850A1 (en) * | 2003-04-23 | 2004-11-04 | Glacier Garlock Bearings, Inc. | Composite bearings |
US9296656B2 (en) * | 2003-09-09 | 2016-03-29 | International Technology Center | UV protective coatings |
FR3027974B1 (fr) * | 2014-11-05 | 2016-12-23 | Snecma | Dispositif de maintien destine a etre present a la surface d'une piece en materiau composite |
-
2019
- 2019-11-12 FR FR1912610A patent/FR3102948B1/fr active Active
-
2020
- 2020-11-04 WO PCT/FR2020/051993 patent/WO2021094672A1/fr unknown
- 2020-11-04 EP EP20817458.1A patent/EP4058276A1/fr active Pending
- 2020-11-04 US US17/774,340 patent/US11867073B2/en active Active
- 2020-11-04 CN CN202080078783.9A patent/CN114746254A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2322095A (en) * | 1997-02-13 | 1998-08-19 | Ctp Davall Limited | Moulded parts used as power and/or motion transmission components |
US20110002779A1 (en) * | 2008-12-24 | 2011-01-06 | Laurent Schuster | Method for Manufacturing by Molding a Machine Structural Element Having an Abradable Surface, and Structural Element |
US20180258241A1 (en) * | 2017-03-10 | 2018-09-13 | Celanese Sales Germany Gmbh | Polyester Polymer Compositions |
Also Published As
Publication number | Publication date |
---|---|
US20220403754A1 (en) | 2022-12-22 |
EP4058276A1 (fr) | 2022-09-21 |
FR3102948A1 (fr) | 2021-05-14 |
WO2021094672A1 (fr) | 2021-05-20 |
FR3102948B1 (fr) | 2022-06-24 |
US11867073B2 (en) | 2024-01-09 |
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