溶浸現象を支配する諸因子について

抄録

This report covers the discussions on the relations between the movement of liquid metal infiltrating into the sintered iron skeleton and the several factors which rule the movement of the liquid. The results are as follows :
1) A general equation on the hydrodynamics of the liquid infiltrating, into the skeleton was obtained:
where,
V=2^1/4⋅S⋅Φ^1/4⋅P_r^3/4⋅(γ_L⋅cosθ/η_L)^1/2⋅t^1/2
V : volume of the liquid (cm³)
S : area of the infiltrated surface (cm²)
Φ : permeability of the skeleton (cm²)
Pr : porosity of the skeleton
γ_L : surface tention of the liquid (g/sec²)
θ_L : contact angle
η_L : viscosity of the liquid (g/cm. sec)
t : time(sec)
2) Experiments were made on the, infiltrating of liquid silver into the iron skeletons of constant dimensions, and the relations between the volume of the infiltrated liquid (V) and several factors (t, Φ, P_r, and γ_L⋅cosθ/η_L) in the above equation were discussed.
(a) Most exponents of t for many specimens were between 3/10-5/10, a littie smaller than 1/2 given in the above equation.
(b) The exponent of Φ were nearly 1/4, the same as that in the above equation.
(c) The exponent of P_r could not be obtained definitely because it is difficult to prepare the iron skeletons with constant Φ value. But it seems that the effect of P_r on V is quite considerable.
(d) The higher the infiltrating temperature, the better was the infiltrating ability into the skeleton. This might be explained by the increased contribution of the term(_γL⋅cosθ/η_L)^1/2 as effectuated by the temperature rise.