Table 1 Creep equation exponents and diffusion paths for various creep mechanisms [adopted from Green (1998)]
From: Creep Mechanisms of Calcium–Silicate–Hydrate: An Overview of Recent Advances and Challenges
Creep mechanism | m | n | Diffusion path |
|---|---|---|---|
Dislocation creep mechanisms | |||
Dislocation glide climb (climb controlled) | 0 | 4–5 | Lattice |
Dislocation glide climb, glide controlled | 0 | 3 | Lattice |
Dissolution of dislocation loops | 0 | 4 | Lattice |
Dislocation climb without glide | 0 | 3 | Lattice |
Dislocation climb by pipe diffusion | 0 | 5 | Dislocation core |
Diffusional creep mechanisms | |||
Vacancy flow through grains | 2 | 1 | Lattice |
Vacancy flow along boundaries | 3 | 1 | Grain boundary |
Interface reaction control | 1 | 2 | Lattice/grain boundary |
Grain boundary sliding mechanisms | |||
Sliding with liquid | 3 | 1 | Liquid |
Sliding without liquid (diffusion control) | 2–3 | 1 | Lattice/grain boundary |