Title:
EVALUATION TEST METHOD FOR INTERNAL COMBUSTION ENGINE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2014/061830
Kind Code:
A1
Abstract:
A sample formed from a nickel-based metal is immersed in a corrosive solution (an aqueous solution containing acid and sodium chloride). The sample that has been immersed in the corrosive solution is exposed to an engine oil flame and heated. By immersing the sample in a specific corrosive solution, added elements in the surface layer region of the sample are depleted, forming a Ni-concentrated phase having an increased Ni concentration. By exposing the sample having the Ni-concentrated phase to the engine oil flame, components in the engine oil are placed in an active state and brought into contact with the specimen, forming a low-melting point phase in the surface layer region of the sample. By heating the sample having the low melting-point phase, melting the low melting-point phase, and resolidifying the low melting-point phase, particles and the like are formed depending on the quality of the material. Even if an engine for testing is not used, simple equipment can be used to evaluate the ease with which particles are formed.
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Inventors:
OTA HAJIME (JP)
NISHIKAWA TAICHIRO (JP)
YAMAZAKI KAZUO (JP)
SAKUTA MASAO (JP)
TOKUDA TAKESHI (JP)
NISHIKAWA TAICHIRO (JP)
YAMAZAKI KAZUO (JP)
SAKUTA MASAO (JP)
TOKUDA TAKESHI (JP)
Application Number:
PCT/JP2013/079800
Publication Date:
April 24, 2014
Filing Date:
November 04, 2013
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
G01N33/20; H01T13/58; C22C19/03; C22C19/05
Foreign References:
| JPH01268836A | 1989-10-26 | |||
| JPH0741893A | 1995-02-10 | |||
| JP2003315253A | 2003-11-06 | |||
| JP2012069393A | 2012-04-05 | |||
| JP4413951B2 | 2010-02-10 |
Attorney, Agent or Firm:
NAKATA, Motomi et al. (JP)
Nakada Motoki (JP)
Nakada Motoki (JP)
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