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PLASMA ELECTROLYTIC CARBO NITRIDING
PLASMA ELECTROLYTIC CARBO NITRIDING
Guided By,
JUSTIN THOMAS
Assistant Professor
Mechanical Department
GECI.
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Presented By,JOHN JOSEPHS7 MechanicalRoll No: 25GECI.
SEMINAR ON
PLASMA ELECTROLYTIC CARBO NITRIDING
CONTENT
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INTRODUCTIONPLASMACARBURIZINGNITRIDING AND CARBONITRIDINGCASE STUDYAPPLICATION CONCLUSIONREFERENCE
PLASMA ELECTROLYTIC CARBO NITRIDING
INTRODUCTION
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Need of hardening
Types of hardening processes
Surface hardening process
PLASMA ELECTROLYTIC CARBO NITRIDING
PLASMA
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PLASMA FORMATION
Fourth state of matter
Collection of nuclei and free electron
Affected by magnetic and electric field
Two types of plasma – natural and artificial
Electric discharge in mediumPower source- DC, RF, microwave
PLASMA ELECTROLYTIC CARBO NITRIDING
PLASMA ELECTROLYTIC CARBO NITRIDING
CARBURISING
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Heat treatment processHeated in presence of carbon bearing
materialsUsed in low carbon steel or low carbon
alloysIncrease in hardnessIncrease in wear resistance
PLASMA ELECTROLYTIC CARBO NITRIDING
CARBONITRIDING
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Carbon and nitrogen diffuses interstitiallyHigher hardness than carburised caseAlso known as: dry cyaniding, gas cyaniding and nicarbing
APPLICATIONGear teethCam shaftBearingsFastnersPinsHydraulic pistons
PLASMA ELECTROLYTIC CARBO NITRIDING
PLASMA ELECTROLYTIC CARBO NITRIDING OF ALUMINIUM
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EXPERIMENTAL STUDY
Cathode - pure aluminium plate Anode- stainless steel container Electrolyte- aqueous solution of glycerol and carbamide DC power supply 150Hz and duty cycle 45% Electrolyte temperature 350
PLASMA ELECTROLYTIC CARBO NITRIDING
VOLTAGE CURRENT CHARACTERITICS
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PLASMA ELECTROLYTIC CARBO NITRIDING
MICRO STRUCTURE
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Micro cracks
Micro channels
PLASMA ELECTROLYTIC CARBO NITRIDING
PHASE CONSTITUENT LAYERS
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Depth of 2µmContains
Aluminium carbide
Aluminium nitride
Aluminium carbonitride
PLASMA ELECTROLYTIC CARBO NITRIDING
COMPOSITION OF CONSTITUENTS
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DIFFUSED REGION
Carbon increases
Nitrogen increases
Al decreases
PLASMA ELECTROLYTIC CARBO NITRIDING
CORROSION BEHAVIOR
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Corrosion current density = 6.85 x 10-7
1/20th of bare aluminium
PLASMA ELECTROLYTIC CARBO NITRIDING
IMPEDENCE OF ALUMINIUM SUBSTRATE
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Corrosion impedance increases
PLASMA ELECTROLYTIC CARBO NITRIDING
INDUCTIVE LOOP
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PLASMA ELECTROLYTIC CARBO NITRIDING
PLASMA ELECTRO CARBO NITRIDING OF TITANIUM CARBONITRIDES(TiCxN1−x)
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EXPERIMENTAL STUDY
Cathode - Titanium disk
Anode - Graphite rod
Electrolyte - Organic solution
DC power supply - 400v, 100hz, duty cycle 30%
Electrolyte temperature- 300
PLASMA ELECTROLYTIC CARBO NITRIDING
SURFACE MORPHOLOGY
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PLASMA ELECTROLYTIC CARBO NITRIDING 18
COMPARISON OF MICRO HARDNESS
Hardness increases about two times
PLASMA ELECTROLYTIC CARBO NITRIDING
CORROSION RESISTANCE
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Corrosion potential of coating increases about 400mV
Current density decreases
PLASMA ELECTROLYTIC CARBO NITRIDING
BIO COMPACTIBILITY OF CALCIUM-TITANIUM CARBONITRIDE
CELL EXPERIMENT
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Osteoblast cell tissue cultured in medium Absorbance of cells measured by micro plate reader Treated titanium contain more cells Cells placed in well plates of titanium alloy and bare titanium
PLASMA ELECTROLYTIC CARBO NITRIDING
ADVANTAGES
For hardening gear tooth
High surface hardness
Increases tensile strength and yield point
Increases fatigue life by about 30 to 100%
Good for high temperature application
Used for metals with low melting point
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PLASMA ELECTROLYTIC CARBO NITRIDING
ADVANTAGES Continuation
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Carried out at low temperature
Lesser time for treatment
Reduced distortion due to low temperature
Any complex parts can be treated
Hardened with out considerable dimensional change
PLASMA ELECTROLYTIC CARBO NITRIDING
APPLICATION AREAS
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Aircraft industry
Defence
Electronic industry - Integrated chips
Internal combustion engine and compressor
PLASMA ELECTROLYTIC CARBO NITRIDING
CONCLUSION
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The carbonitrided layer on aluminium contains AL4C3, ALN and AL7C3N3 phases.
PEC/N treatment greatly improves the corrosion resistance of pure aluminium.
Bio compatibility increases when calcium treated with titanium Hardness value increases Low melting point materials can be successfully treated with
pec/n process
PLASMA ELECTROLYTIC CARBO NITRIDING
REFERENCE Jie Wu,Yifan Zhang , Run Liu, Bin Wang, Ming Hua, Wenbin Xue Anti-corrosion Layer
Prepared By Plasma Electrolytic Carbonitriding On Pure Aluminium International journal of applied surface science
Xudong Wang, Xin Pan, Wenting Ye, Yanlin Wei, Yashao Chen Preparation and properties of TiCxN1−x coatings containing calcium on titanium surface by plasma electrolytic carbonitriding.International journal of surface coating and technology
YongkunQin , DangshengXiong, JianliangLi , RajneeshTyagi Corrosion and bio-tribological properties of Ti(CN)x hard coating on titanium alloy by the pulsed plasma electrolytic carbonitriding process.Tribology international
S.A. Kusmanov , A.A. Smirnov, S.A. Silkin, V.I. Parfenyuk, P.N. Belkin Plasma electrolytic nitriding of alpha- and beta-titanium alloy in ammonia-based electrolyte. International journal of surface coating and technology
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PLASMA ELECTROLYTIC CARBO NITRIDING
ANY QUESTIONS??
PLASMA ELECTROLYTIC CARBO NITRIDING
THANKYOU
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