Plasma and Thermal Spraying (eBook)

Juraj Ružbarský, Anton Panda (Autoren)

eBook Download: PDF

2016 | 1st ed. 2017
X, 108 Seiten
Springer International Publishing (Verlag)
978-3-319-46273-8 (ISBN)

Infos

This book presents the principles of plasma and heat spraying. It introduces plasma jet and the formation of plasma sprayed coatings. It explains the adhesion process and also presents standard methods for measurement according to DIN forms. Some case studies are presented for illustration.

Juraj Ružbarský is an associate professor at the Technical University of Kosice. He is member of the editorial board of Acta Agriculturae and member of Czech Chemical Society.

Inhalt

Contents 6
Introduction 9
1 Plasma Jet 11
1.1 Characteristics of Plasma Spraying 11
1.2 Temperature and Performance of Plasma Jet 14
1.3 Exhaust Velocity 16
1.4 Plasma Gases 18
1.4.1 Dissociation, Ionization and Enthalpy of Plasma Gases 19
1.4.1.1 Basic Characteristic Properties of Plasma Gases 19
1.5 Thermal Conductivity of Plasma 21
1.6 Electric Conductivity of Plasma 21
2 Formation of Plasma Sprayed Coating 23
2.1 Powder Transport, Flow Trajectory and Velocity of Sprayed Particles 23
2.2 Mutual Influence of Molten Material with Plasma Jet and Ambient Atmosphere 25
2.3 Impingement of Flowing Particles onto the Backplate 27
2.4 Thermic Influence upon the Backplate and Sprayed Coating 30
2.5 Physical and Chemical Changes of Material in Spraying 32
3 Basic Properties of Plasma Coatings 34
3.1 Structure 34
3.2 Density and Porosity 35
3.3 Bonding, Internal Stress, Coating Thickness 35
3.4 Strength, Hardness, Deformability 36
3.5 Thermal and Electric Conductivity 38
4 Adhesion of Plasma Sprayed Coatings to Basic Backplate 40
4.1 Types of Bonding Forces 40
4.2 Theoretical Aspects of Optimal Adhesion Formation 41
4.3 Principal Factors Influencing Adhesion of Coating to Basic Surface 42
4.3.1 Thickness of Coating 42
4.3.2 Pretreatment of Basic Material Surface 43
4.3.3 Parameters of Spraying Process 45
4.4 Experimental Assessment of Adhesion of Plasma Sprayed Coatings to Basic Backplate 45
4.4.1 Testing Methods of Adhesion Detection 45
4.4.2 Adhesion Test According to DIN 50 160 Standard 46
4.4.3 Adhesion Test According to DIN 50 161 Standard 48
4.4.4 Adhesion Test by the Apex Stone Method 49
5 Plasma Spraying Equipment 52
5.1 Basic Scheme of Plasma Spraying Equipment 52
5.2 Plasma Torches 53
6 Thermal Spraying 57
6.1 General Characteristics of Thermal Spraying 58
6.2 Theoretical Bases of Thermal Spray Applications 59
6.2.1 Adhesion of Thermal Sprayed Particles to the Basic Surface and Cohesion of Film Particles 59
6.2.1.1 Influence of Temperature of Particles and of Basic Material 59
6.2.1.2 Influence of Velocity of Particles 60
6.2.1.3 Voluminous Processes 61
6.2.2 Methods of Regulation of Interaction Between the Sprayed Particle Material and the Basic Material 61
6.3 Technology of Thermal Spraying 62
6.3.1 Flame Spraying 63
6.3.2 Electric Arc Spraying 64
7 Adhesion Tests 66
7.1 Theoretical Analysis 66
7.2 Experimental Conditions 70
7.2.1 Plasma Spraying 71
7.2.1.1 Molybdenum Coatings 72
7.2.1.2 Coatings on the Basis of Al2O3 75
7.2.1.3 Coatings on the Basis of ZrO2 + 25 % MgO 76
7.2.1.4 Coatings of ZrSiO4 77
7.2.1.5 Measurement Results 77
7.2.1.6 Discussion of the Achieved Results 79
7.2.2 Thermal Spraying 80
7.2.2.1 Discussion of the Achieved Results 84
8 Thermal Fatigue Tests 85
8.1 Theoretical Analysis 85
8.2 Experimental Conditions 87
9 Roughness of Spray Coating Surface 90
10 Corrosion Tests 92
11 Assessment of Properties of Films on Cylindrical Testing Rods 93
12 Operation Tests 94
12.1 Material 12 060 96
12.2 Material 15 230 97
12.3 Material 19 541 98
13 Conclusion 101
Annexes 103
Bibliography 109

Produkt-Details

• Erscheint lt. Verlag: 27.9.2016
• Reihe/Serie: SpringerBriefs in Applied Sciences and Technology
• Reihe/Serie: SpringerBriefs in Applied Sciences and Technology
• Zusatzinfo: X, 108 p. 64 illus.
• Verlagsort: Cham
• Sprache: englisch
• Themenwelt: Technik ► Maschinenbau
• Themenwelt: Wirtschaft
• Schlagworte: Corrosion Tests • heat metal spraying • Metal spraying • plasma metal spraying • thermal fatigue test
• ISBN-10: 3-319-46273-3 / 3319462733
• ISBN-13: 978-3-319-46273-8 / 9783319462738