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1. WO2007147532 - PISTON RING WITH CHROMIUM NITRIDE COATING FOR INTERNAL COMBUSTION ENGINES

Publication Number WO/2007/147532
Publication Date 27.12.2007
International Application No. PCT/EP2007/005312
International Filing Date 16.06.2007
IPC
F16J 9/26 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
JPISTONS; CYLINDERS; PRESSURE VESSELS IN GENERAL; SEALINGS
9Piston-rings, seats therefor; Ring sealings of similar construction in general
26characterised by the use of particular materials
C23C 14/06 2006.01
CCHEMISTRY; METALLURGY
23COATING 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
CCOATING 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
14Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
06characterised by the coating material
CPC
C23C 14/0036
CCHEMISTRY; METALLURGY
23COATING 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
CCOATING 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
14Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
0021Reactive sputtering or evaporation
0036Reactive sputtering
C23C 14/0641
CCHEMISTRY; METALLURGY
23COATING 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
CCOATING 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
14Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
06characterised by the coating material
0641Nitrides
F16J 9/26
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
JPISTONS
9Piston-rings ; , e.g. non-metallic piston-rings; , seats therefor; Ring sealings of similar construction
26characterised by the use of particular materials
Y10T 428/265
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
428Stock material or miscellaneous articles
26Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
263Coating layer not in excess of 5 mils thick or equivalent
264Up to 3 mils
2651 mil or less
Applicants
  • MAHLE INTERNATIONAL GMBH [DE]/[DE] (AllExceptUS)
  • MAHLE METAL LEVE S.A. [BR]/[BR] (AllExceptUS)
  • ARAUJO, Juliano, Avelar [BR]/[BR] (UsOnly)
  • MARQUES, Gisela, Ablas [BR]/[BR] (UsOnly)
  • SARABANDA, Jose, Valentim, Lima [BR]/[BR] (UsOnly)
  • BANFIELD, Robert, Richard [BR]/[BR] (UsOnly)
Inventors
  • ARAUJO, Juliano, Avelar
  • MARQUES, Gisela, Ablas
  • SARABANDA, Jose, Valentim, Lima
  • BANFIELD, Robert, Richard
Agents
  • POHLE, Reinhard
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) PISTON RING WITH CHROMIUM NITRIDE COATING FOR INTERNAL COMBUSTION ENGINES
(FR) SEGMENT DE PISTON À REVÊTEMENT DE NITRURE DE MOTEUR À COMBUSTION INTERNE
Abstract
(EN)
The invention relates to a piston ring for internal combustion engines, the piston ring comprises a steel or cast iron base material with a coating of chromium nitride deposited by a physical vapor deposition process on a sliding surface of the piston ring, wherein the coating is composed of a columnar crystal structure of CrN with the following features: (a) an oxygen content in solid solution of 0.5 to 2.5 wt %; (b) a content of uniformly dispersed micro-pores of less than 10 % in volume of the coating; and (c) an X-ray diffraction intensity ratio of (111) planes to (200) planes parallel to the surface in the range of 0.80 to 1.20.
(FR)
L'invention porte sur un segment de piston à revêtement de nitrure de moteur à combustion interne comprenant une base de fer ou de fonte revêtue d'un revêtement de nitrure de chrome déposé par dépôt chimique en phase vapeur sur sa surface de glissement. Ledit revêtement présente une structure de cristaux basaltiques de CrN aux caractéristiques suivantes: (a) teneur en oxygène en solution solide, de 0,5 à 2,5 % en poids; (b) contenu de micropores uniformément dispersés de moins de 10 % du volume du revêtement; et (c) rapport d'intensité de diffraction des rayons X de (111 ) à (200) plans parallèles à la surface, de 0,80 à 1,20.
Also published as
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