Abstract
A general equation on the bending curvature of iron powder compacts during bronze-infiltrating process was constructed by assuming that the infiltrating process would go through following four steps:
1) Generating of liquid phase from the bronze infiltrant.
2) Infiltrating of the liquid phase into the iron skeleton.
3) Dimensional changes of the skeleton during infiltrating process.
4) Bending of the skeleton based on the difference between dimensional changes of the upper and the lower parts of itself during infiltrating process.
That is, 1/ρ=K⋅Pr1/2⋅R-1⋅H-1{t1/2-(t-ty=H)1/2}
where, l/ρ: curvature of bending (cm-1)
K: constant
Pr: porosity of the skeleton
R: radius of the capillary (cm)
H: height of the skeleton (cm)
t: time (sec)
ty: time taken for liquid to infiltrate to the point of y, in the height direction of the skeleton (sec)
From experimental results of infiltration under several constant infiltrating conditions, it was confirmed on the whole that the general equation could he adapted to the actual infiltrating process.
