theory and practice of ceramic processes
TRANSCRIPT
1 Theory and Practice of Ceramic Processes
Theory and Practice of Ceramic Processes
Sintering of Ceramic Powders
Waldemar Pyda
Scope: Sintering
Breaking-down processes
2 Theory and Practice of Ceramic Processes
Categories of Sintering
3 Theory and Practice of Ceramic Processes
Selected materials
and connected
sintering processes
4 Theory and Practice of Ceramic Processes
SOLID-STATE SINTERING
Driving forces
Compres. Tensile
Stresses induced in the neck
5 Theory and Practice of Ceramic Processes
Determination of radia of curvature
21
11'
RRP
6 Theory and Practice of Ceramic Processes
Mechanisms of sintering
21
11'
RRP
Comp. Tens.
7 Theory and Practice of Ceramic Processes
Stages of sintering
Inital Intermediate Final
8 Theory and Practice of Ceramic Processes
Stages of sintering – a model
9 Theory and Practice of Ceramic Processes
Competition between densification and sintering
10 Theory and Practice of Ceramic Processes
Effects of grain boundaries
11 Theory and Practice of Ceramic Processes
Pore stability during sintering
12 Theory and Practice of Ceramic Processes
Sintering models
Analytical models
13 Theory and Practice of Ceramic Processes
Herring’s Scalling Law
14 Theory and Practice of Ceramic Processes
Sintering Stress
15 Theory and Practice of Ceramic Processes
The Stress Intensification Factor
16 Theory and Practice of Ceramic Processes
Normal and abnormal grain growth
17 Theory and Practice of Ceramic Processes
Normal Grain Growth
18 Theory and Practice of Ceramic Processes
Abnormal Grain Growth
19 Theory and Practice of Ceramic Processes
Abnormal Grain Growth
20 Theory and Practice of Ceramic Processes
Ostwald Ripening
21 Theory and Practice of Ceramic Processes
Control of Grain Growth
Solute drag
The Zener formula
22 Theory and Practice of Ceramic Processes
Grain Growth and Pore Evolution in Porous
Compacts
23 Theory and Practice of Ceramic Processes
Interaction between Pores and Grain Boundaries
24 Theory and Practice of Ceramic Processes
Microstructural Maps
25 Theory and Practice of Ceramic Processes
Microstructural Maps
26 Theory and Practice of Ceramic Processes
LIQUID-PHASE SINTERING
27 Theory and Practice of Ceramic Processes
LIQUID-PHASE SINTERING
Tens.
28 Theory and Practice of Ceramic Processes
Liquid-phase redistribution
29 Theory and Practice of Ceramic Processes
Morphology of liquid phase in the microstructure of
polycrystals
Dihedral angle dependence of liquid phase distribution
30 Theory and Practice of Ceramic Processes
Effects of Gravity
31 Theory and Practice of Ceramic Processes
Grain Boundary Films
32 Theory and Practice of Ceramic Processes
Effective Stress
33 Theory and Practice of Ceramic Processes
Role of the Wetting Angle
34 Theory and Practice of Ceramic Processes
Relative Amount of Liquid Phase
35 Theory and Practice of Ceramic Processes
Reaction Sintering
36 Theory and Practice of Ceramic Processes
Influence of Processing Parameters
37 Theory and Practice of Ceramic Processes
Sintering with etching o polycrystalline particles
38 Theory and Practice of Ceramic Processes
CONSTRAINED SINTERING
Disperced Inert Phases
39 Theory and Practice of Ceramic Processes
Supported Films
40 Theory and Practice of Ceramic Processes
Sintering Practice
Heating Schedules
Isothermal Sintering
Constant Heating Rate Sintering
41 Theory and Practice of Ceramic Processes
Sintering Practice
Multi-stage Sintering
Rate-Controlled Sintering
Fast-Firing
42 Theory and Practice of Ceramic Processes
Sintering Practice
Microwave Sintering
43 Theory and Practice of Ceramic Processes
Sintering Practice
Plasma-Assisted Sintering
44 Theory and Practice of Ceramic Processes
Pressure-Assisted Sintering
Hot pressing
45 Theory and Practice of Ceramic Processes
Pressure-Assisted Sintering
Sinter Forging
46 Theory and Practice of Ceramic Processes
Pressure-Assisted Sintering
Hot Isostatic Pressing (HIPing)
47 Theory and Practice of Ceramic Processes
Particle and Green Compact Characteristics
Particle size
48 Theory and Practice of Ceramic Processes
Particle and Green Compact Characteristics
Particle Size Distribution
49 Theory and Practice of Ceramic Processes
Particle and Green Compact Characteristics
Particle Shape and Particle Structure
50 Theory and Practice of Ceramic Processes
Particle and Green Compact Characteristics
Particle Packing Differential densification
51 Theory and Practice of Ceramic Processes
Particle and Green Compact Characteristics
Effect of Green Density on Sintering
52 Theory and Practice of Ceramic Processes
CHEMISTRY CONSIDERATIONS Gases in Pores
53 Theory and Practice of Ceramic Processes
CHEMISTRY CONSIDERATIONS
Vapor transport
Volatilization and Decomposition
54 Theory and Practice of Ceramic Processes
CHEMISTRY CONSIDERATIONS
Oxidation State
55 Theory and Practice of Ceramic Processes
CHEMISTRY CONSIDERATIONS
Defect chemistry and Stoichiometry
56 Theory and Practice of Ceramic Processes
Thank you for attention