S. Beckman et al., An analysis of electrical resistivity of compositions within the Mo-Si-B ternary system part II: Multi-phase composites, MAT SCI E A, 299(1-2), 2001, pp. 94-104
The temperature dependence of electrical resistivity between 25 and 1500 de
greesC was determined for several multiphase composites within the Mo-Si-B
system. The electrical behavior of these composites is determined by that o
f the single phase components and can be characterized as representative of
semimetallic behavior. A predictive model for the resistivity of composite
s based on the properties of the single phase benchmark compounds was devel
oped based on a logarithmic rule-of-mixture relationship. Error values for
the model were calculated based on experimental error in the determination
of volume fraction, porosity, and resistivity of each phase as a function o
f temperature. Experimental resistivity values for multiphase compositions
within the Mo5Si3-MoSi2, Mo(5)Si(3)Bx (T1)-MoB-MoSi2, and Mo(5)Si(3)Bx-Mo5S
iB2 (T2)-Mo3Si phase fields are shown to be in good agreement with the mode
l to within one standard deviation. (C) 2001 Elsevier Science B.V. All righ
ts reserved.