CN102428206A - 滑动元件 - Google Patents
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
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- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/0605—Carbon
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
- F16J9/26—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction characterised by the use of particular materials
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T428/00—Stock material or miscellaneous articles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
- Y10T428/264—Up to 3 mils
- Y10T428/265—1 mil or less
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
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- Y10T428/30—Self-sustaining carbon mass or layer with impregnant or other layer
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- Pistons, Piston Rings, And Cylinders (AREA)
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Abstract
本发明涉及一种内燃机的滑动元件,尤其指一种活塞环,其具有ta-C型的DLC涂层,所述涂层具有至少一个残余应力梯度。
Description
技术领域
本发明涉及一种内燃机中的滑动元件,尤其涉及一种活塞环。
背景技术
在降低内燃机的二氧化碳排放时,燃料消耗量充当着重要角色。燃料消耗量主要受发动机内(特别是活塞区域,例如在活塞环上)的摩擦损耗的影响。因此对内燃机中的滑动元件(特别是对活塞环)存在要求,在其整个使用寿命中尽可能具有最好的摩擦特质。对于整个使用寿命,将考虑到分别引起润摩特性改变的磨合特质、任何可能的润滑不足和任何焦痕的形成。
在所述技术领域中已知在硬基材上的PVD涂层,虽然其具有良好耐磨性,但是仍需要在摩擦系数上有所改进。
DE102005063123B3公开了一种层状结构,其从外侧到内侧具有磨合层、粘合层以及磨损保护层。然而,已经证实了仍能够改进在使用寿命中的摩擦特性的特质。
发明内容
本发明的基本目的是提供一种内燃机的滑动元件,尤其是一种活塞环,其具有在可能的最长时间段内具有可靠的良好的摩擦特性的涂层。
借助权利要求1所述的滑动元件1实现了所述目的。
因此,滑动元件1具有ta-C(非晶四面体碳)型的DLC涂层,在其厚度上具有变化的残余应力(residual stress)。也就是说,在涂层厚度上形成至少一个残余应力梯度。正如所知,“DLC”代表类金刚石。例如,非晶四面体碳型的特征在于四面体结构、无氢并且例如在德国工程师协会标准指南(VDIguideline)2840中进行了定义。这种类型的层一方面提供了良好的摩擦特质,而且由于以下原因还具有特别长久的使用寿命。
一方面,在层厚度上的残余应力的变动能够产生较厚的层厚度,例如大于10μm,而不会出现关于层的粘合或脆度的问题。具体地,例如,能够实现具有低层残余应力的区域来松弛或缓解整个成层材料(layer composite),即,局部设置的特定的多层涂层。这样,由于在内燃机内使用时而具有高推力负载应力,所以不会超出DLC涂层的弹性极限。据此,能够成功地限制涂层的损耗。
将在其它权利要求中描述根据本发明的滑动元件的优选的进一步的改进。
当由外侧至内侧所视时,对于从涂层至滑动元件的基材的跨接来说,已经证实在此(即涂层的内部区域)的负残余应力梯度是有益的。也就是说,朝向基材的残余应力下降至一个低值以便实现基材的有利的应力跨接以及良好的层的粘合。
当由外侧至内侧所视时,对于位于外侧的区域来说,已经证实正残余应力梯度是有益的。也就是说,相对低等级的残余应力存在于涂层的外部表面,并且已经证实这有益于良好的磨合特质。然而,优选地,残余应力自此朝向内侧大幅提高从而实现上述效果。
对于涂层的中央区域(即,不在正外侧也不在正内侧)来说,已经证实优选地小于涂层内部区域(即,位于朝向基材)的负残余应力梯度的负残余应力梯度是有益的。这样,具有最高等级的残余应力位于至涂层外侧相对长的路径上,这就允许人们期望有益特质。
具体地,对于具有极高的表面压力的滑动元件来说,在最内部区域(即,直接靠着基材)中的恒定的低残余应力分布是有益的。
此外,借助于提供在涂层外侧上的同样恒定的、相对低的而优选地高于在最内部区域的等级的残余应力分布,能够进一步改善磨合特质。
为了避免涂层断裂的蔓延,已经证实在中间区域的大范围的交错的残余应力是有益的。据此,具有低残余应力的区域的范围能够小于、等于或大于具有高残余应力的区域的范围。
对于周期来说,0.1μm至1μm的数值为可想到的,所述周期即在低残余应力的区域的起点跨过高残余应力的区域至下一个低残余应力的区域的起点之间的厚度。
总之,借助于上述方法,能够生产出具有10μm或更高的厚度的涂层,其效果一方面为有良好的磨合特质,同时还构成了足够的层厚度以便确保在不可避免的磨损后具有涂层的良好的摩擦特性的长使用寿命。
例如,sp2(石墨结构)杂化碳原子和sp3(金刚石结构)杂化碳原子的比例的改变有助于产生不同的残余应力。具体地,能够通过增加sp3的份数来增加残余应力的压力,并且这能够使整体残余应力梯度的形成。
这种应用类似于增加密度从而期望能够在层厚度上改变残余应力有助于在层厚度上改变层密度。
最后,已经考虑到在层厚度上改变层硬度,因为更高的硬度导致更高的残余应力压力,因此这样也能实现所需的残余应力梯度。
附图说明
参考附图,以下详细描述了作为示例的本发明的实施例。其如下所示:
图1为在第一实施例中的DLC涂层的厚度上的残余应力分布的图示;以及
图2为在第二实施例中的DLC涂层的厚度上的残余应力分布的图示。
具体实施方式
在附图中,在涂层的厚度上相应地标示了DLC涂层的残余应力,涂层的最外层区域位于图的左边,并且涂层的最内层区域位于图的右边。也就是说,基材(例如钢或灰生铁)与具有右边所示的残余应力的涂层邻接。
在图1的实施例中,从涂层的内部区域或“基底”(区域III)开始(由外侧至内侧)形成了负残余应力梯度。换句话说,在至基材的跨接段上的残余力特别低以便实现良好的应力跨接以及良好的涂层粘合。在中间区域(区域II)中的残余应力进一步提高至最高等级,但具有更低的梯度。在外侧(区域I)上的残余应力大幅下降,也就是说由外侧至内侧形成了高的正残余应力梯度,并且这导致了良好的磨合特质。
图2的实施例以相同方式实施,其中最初在最外层的区域I中的残余应力为恒定的低等级,并且随后(在区域II中)大幅提升。这就在区域I和残余应力大范围交错的区域III之间提供了应力依从跨接(stress-dependantcross-over)。具体地,已经证实当加载推力应力时,恒定的高残余应力状态有断裂的危险。区域III中的交错的残余应力防止断裂的蔓延。例如,在此区域中的周期α能够在0.1μm和1μm之间。类似图1的实施例,具有强的负残余应力梯度的区域IV邻接基材(在附图右边),并且直接邻接到具有恒定的低残余应力分布的基材区域V以便实现到基材的良好的应力跨接和良好的粘合。具体地,区域V中的残余应力等级能够低于最外层区域I中的残余应力等级,并且区域III中的残余应力能够在最大绝对值和略高于区域I的等级的等级之间变化。
Claims (12)
1.一种内燃机的滑动元件,尤其一种活塞环,其具有ta-C型的DLC涂层,在其厚度上具有变化的残余应力以及至少一个残余应力梯度。
2.根据权利要求1所述的滑动元件,其特征在于,当从外侧向内侧所视时,在位于朝向基材的区域(III、IV)中,形成了负残余应力梯度。
3.根据权利要求1或2所述的滑动元件,其特征在于,当从外侧向内侧所视时,在位于外侧的区域(I、II)中,形成了正残余应力梯度。
4.根据前述任何一项权利要求所述的滑动元件,其特征在于,当从外侧向内侧所视时,在所述涂层的中间区域(II)中,形成了负残余应力梯度,优选地所述负残余应力梯度小于位于内部的区域中的负残余应力梯度。
5.根据前述任何一项权利要求所述的滑动元件,其特征在于,在所述涂层的最内层区域(V)和/或最外层区域(I)中的残余应力基本上为恒定的。
6.根据前述任何一项权利要求所述的滑动元件,其特征在于,在所述最内层区域中的所述残余应力低于在所述涂层的所述最外层区域中的所述残余应力。
7.根据前述任何一项权利要求所述的滑动元件,其特征在于,在所述涂层的所述中间区域(III)中形成了大范围交错的残余应力。
8.根据权利要求7所述的滑动元件,其特征在于,交错周期(α)为0.1μm至1μm。
9.根据前述任何一项权利要求所述的滑动元件,其特征在于,所述涂层为10μm或者更厚。
10.根据前述任何一项权利要求所述的滑动元件,其特征在于,在具有残余应力梯度的至少一个区域中存在有sp2和sp3杂化碳原子之间的变化率。
11.根据前述任何一项权利要求所述的滑动元件,其特征在于,在具有残余应力梯度的至少一个区域中存在有变化的层密度。
12.根据前述任何一项权利要求所述的滑动元件,其特征在于,在具有残余应力梯度的至少一个区域中存在有变化的层硬度。
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DE102009003232.0 | 2009-05-19 | ||
DE102009003232A DE102009003232A1 (de) | 2009-05-19 | 2009-05-19 | Gleitelement eines Verbrennungsmotors, insbesondere Kolbenring |
PCT/EP2010/052320 WO2010133384A1 (de) | 2009-05-19 | 2010-02-24 | Gleitelement |
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EP (2) | EP2432913B1 (zh) |
JP (2) | JP5583207B2 (zh) |
KR (2) | KR101617910B1 (zh) |
CN (2) | CN102428206B (zh) |
BR (2) | BRPI1013038B1 (zh) |
DE (1) | DE102009003232A1 (zh) |
PT (2) | PT2432913E (zh) |
RU (2) | RU2519181C2 (zh) |
WO (2) | WO2010133384A1 (zh) |
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CN110446883A (zh) * | 2017-03-31 | 2019-11-12 | 株式会社理研 | 滑动构件和活塞环 |
US10823288B2 (en) | 2017-03-31 | 2020-11-03 | Kabushiki Kaisha Riken | Sliding member and piston ring |
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Also Published As
Publication number | Publication date |
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JP5583207B2 (ja) | 2014-09-03 |
RU2011151547A (ru) | 2013-06-27 |
CN102428206B (zh) | 2014-05-14 |
BRPI1010899A2 (pt) | 2023-11-07 |
KR101617910B1 (ko) | 2016-05-03 |
US9169547B2 (en) | 2015-10-27 |
US8986821B2 (en) | 2015-03-24 |
BRPI1013038A2 (pt) | 2016-08-23 |
KR20120016656A (ko) | 2012-02-24 |
US20120161401A1 (en) | 2012-06-28 |
PT2432915E (pt) | 2013-07-09 |
EP2432915B1 (de) | 2013-06-05 |
CN102428208B (zh) | 2013-11-27 |
CN102428208A (zh) | 2012-04-25 |
PT2432913E (pt) | 2013-07-09 |
DE102009003232A1 (de) | 2010-12-02 |
WO2010133384A1 (de) | 2010-11-25 |
JP2012527583A (ja) | 2012-11-08 |
RU2518823C2 (ru) | 2014-06-10 |
JP5685583B2 (ja) | 2015-03-18 |
KR20120014590A (ko) | 2012-02-17 |
EP2432913B1 (de) | 2013-06-05 |
EP2432913A1 (de) | 2012-03-28 |
RU2519181C2 (ru) | 2014-06-10 |
RU2011151633A (ru) | 2013-06-27 |
BRPI1013038B1 (pt) | 2019-10-22 |
KR101617911B1 (ko) | 2016-05-03 |
JP2012527581A (ja) | 2012-11-08 |
WO2010133633A1 (de) | 2010-11-25 |
US20120068418A1 (en) | 2012-03-22 |
EP2432915A1 (de) | 2012-03-28 |
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