ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The rheological properties of a ceramic moulding compound, silicon powder with a polypropylene binder system, were studied using a Rheometrics mechanical spectrometer RMS-800 and an Instron capillary rheometer. The study included steady simple shear flow, transient start-up shear flow, stress relaxation upon cessation of steady shear flow, stress relaxation after a sudden shear displacement, and dynamic oscillatory shear flow. Yield behaviour was observed in both steady-shear and dynamic measurements. The empirical Cox-Merz rule which is usually applicable to polymer melts and solutions was found to be invalid for this material. The modified Cox-Merz rule, in which the apparent viscosity versus shear rate is equal to the complex viscosity versus the shear-rate amplitude in the highly nonlinear region, was found to be valid for this material system. A series of anomalous phenomena were also observed during the shear-flow experiments including work hardening in the very-low-shear-rate region, stress oscillation in the high-shear-rate region, and stress relaxation followed by substantial stress growth in the stress-relaxation measurements.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01117603
