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Table of Contents
Introduction; 1 Plasma Jet; 1.1 Characteristics of Plasma Spraying; 1.2 Temperature and Performance of Plasma Jet; 1.3 Exhaust Velocity; 1.4 Plasma Gases; 1.4.1 Dissociation, Ionization and Enthalpy of Plasma Gases; 1.4.1.1 Basic Characteristic Properties of Plasma Gases; 1.5 Thermal Conductivity of Plasma; 1.6 Electric Conductivity of Plasma; 2 Formation of Plasma Sprayed Coating; 2.1 Powder Transport, Flow Trajectory and Velocity of Sprayed Particles; 2.2 Mutual Influence of Molten Material with Plasma Jet and Ambient Atmosphere.
2.3 Impingement of Flowing Particles onto the Backplate2.4 Thermic Influence upon the Backplate and Sprayed Coating; 2.5 Physical and Chemical Changes of Material in Spraying; 3 Basic Properties of Plasma Coatings; 3.1 Structure; 3.2 Density and Porosity; 3.3 Bonding, Internal Stress, Coating Thickness; 3.4 Strength, Hardness, Deformability; 3.5 Thermal and Electric Conductivity; 4 Adhesion of Plasma Sprayed Coatings to Basic Backplate; 4.1 Types of Bonding Forces; 4.2 Theoretical Aspects of Optimal Adhesion Formation; 4.3 Principal Factors Influencing Adhesion of Coating to Basic Surface.
4.3.1 Thickness of Coating4.3.2 Pretreatment of Basic Material Surface; 4.3.3 Parameters of Spraying Process; 4.4 Experimental Assessment of Adhesion of Plasma Sprayed Coatings to Basic Backplate; 4.4.1 Testing Methods of Adhesion Detection; 4.4.2 Adhesion Test According to DIN 50 160 Standard; 4.4.3 Adhesion Test According to DIN 50 161 Standard; 4.4.4 Adhesion Test by the Apex Stone Method; 5 Plasma Spraying Equipment; 5.1 Basic Scheme of Plasma Spraying Equipment; 5.2 Plasma Torches; 6 Thermal Spraying; 6.1 General Characteristics of Thermal Spraying.
6.2 Theoretical Bases of Thermal Spray Applications6.2.1 Adhesion of Thermal Sprayed Particles to the Basic Surface and Cohesion of Film Particles; 6.2.1.1 Influence of Temperature of Particles and of Basic Material; 6.2.1.2 Influence of Velocity of Particles; 6.2.1.3 Voluminous Processes; 6.2.2 Methods of Regulation of Interaction Between the Sprayed Particle Material and the Basic Material; 6.3 Technology of Thermal Spraying; 6.3.1 Flame Spraying; 6.3.2 Electric Arc Spraying; 7 Adhesion Tests; 7.1 Theoretical Analysis; 7.2 Experimental Conditions; 7.2.1 Plasma Spraying.
7.2.1.1 Molybdenum Coatings7.2.1.2 Coatings on the Basis of Al2O3; 7.2.1.3 Coatings on the Basis of ZrO2+25% MgO; 7.2.1.4 Coatings of ZrSiO4; 7.2.1.5 Measurement Results; 7.2.1.6 Discussion of the Achieved Results; 7.2.2 Thermal Spraying; 7.2.2.1 Discussion of the Achieved Results; 8 Thermal Fatigue Tests; 8.1 Theoretical Analysis; 8.2 Experimental Conditions; 9 Roughness of Spray Coating Surface; 10 Corrosion Tests; 11 Assessment of Properties of Films on Cylindrical Testing Rods; 12 Operation Tests; 12.1 Material 12060; 12.2 Material 15230; 12.3 Material 19541; 13 Conclusion; Annexes.
2.3 Impingement of Flowing Particles onto the Backplate2.4 Thermic Influence upon the Backplate and Sprayed Coating; 2.5 Physical and Chemical Changes of Material in Spraying; 3 Basic Properties of Plasma Coatings; 3.1 Structure; 3.2 Density and Porosity; 3.3 Bonding, Internal Stress, Coating Thickness; 3.4 Strength, Hardness, Deformability; 3.5 Thermal and Electric Conductivity; 4 Adhesion of Plasma Sprayed Coatings to Basic Backplate; 4.1 Types of Bonding Forces; 4.2 Theoretical Aspects of Optimal Adhesion Formation; 4.3 Principal Factors Influencing Adhesion of Coating to Basic Surface.
4.3.1 Thickness of Coating4.3.2 Pretreatment of Basic Material Surface; 4.3.3 Parameters of Spraying Process; 4.4 Experimental Assessment of Adhesion of Plasma Sprayed Coatings to Basic Backplate; 4.4.1 Testing Methods of Adhesion Detection; 4.4.2 Adhesion Test According to DIN 50 160 Standard; 4.4.3 Adhesion Test According to DIN 50 161 Standard; 4.4.4 Adhesion Test by the Apex Stone Method; 5 Plasma Spraying Equipment; 5.1 Basic Scheme of Plasma Spraying Equipment; 5.2 Plasma Torches; 6 Thermal Spraying; 6.1 General Characteristics of Thermal Spraying.
6.2 Theoretical Bases of Thermal Spray Applications6.2.1 Adhesion of Thermal Sprayed Particles to the Basic Surface and Cohesion of Film Particles; 6.2.1.1 Influence of Temperature of Particles and of Basic Material; 6.2.1.2 Influence of Velocity of Particles; 6.2.1.3 Voluminous Processes; 6.2.2 Methods of Regulation of Interaction Between the Sprayed Particle Material and the Basic Material; 6.3 Technology of Thermal Spraying; 6.3.1 Flame Spraying; 6.3.2 Electric Arc Spraying; 7 Adhesion Tests; 7.1 Theoretical Analysis; 7.2 Experimental Conditions; 7.2.1 Plasma Spraying.
7.2.1.1 Molybdenum Coatings7.2.1.2 Coatings on the Basis of Al2O3; 7.2.1.3 Coatings on the Basis of ZrO2+25% MgO; 7.2.1.4 Coatings of ZrSiO4; 7.2.1.5 Measurement Results; 7.2.1.6 Discussion of the Achieved Results; 7.2.2 Thermal Spraying; 7.2.2.1 Discussion of the Achieved Results; 8 Thermal Fatigue Tests; 8.1 Theoretical Analysis; 8.2 Experimental Conditions; 9 Roughness of Spray Coating Surface; 10 Corrosion Tests; 11 Assessment of Properties of Films on Cylindrical Testing Rods; 12 Operation Tests; 12.1 Material 12060; 12.2 Material 15230; 12.3 Material 19541; 13 Conclusion; Annexes.