Matrix microstructure

Matrix Microstructure and Its Possible Influence on Physical Properties... 

MEYER AND GYETVAY Carbon-Carbon Composites Matrix Microstructure 381... 

The exact role of matrix microstructure in determining the physical properties of C-C composites is difficult to determine precisely because the microstructural variations and fiber-matrix interactions are highly complex. Some insight into the importance of... 

The interest in development of SiC/Si3N4 composites stems from the fact that (a) SiC and Si3N4 are thermodynamically compatible and stable at temperatures to 1700°C, (b) silicon nitride processing temperature can be tailored to avoid fiber degradation, (c) silicon nitride matrix microstructure can be controlled to inprove composite properties such as matrix cracking strength and thermal conductivity. 

Ziegler G, Lucke J, Richter I, Suttor D, C-fibre reinforced composites with pol5nner-deiived matrix, microstructure, thermal properties, strength, Baxter J, Cot L, Fordham R, Gabis V, Hellot Y, Lefebvre M, Le Doussal H, Le Sech A, Naslain R, Sevagen A eds., European Ceramic Society, Euro Ceramics V, Part 3. Trans Tech Publications, Switzerland, 1870-1873, 1997 Key Eng Mater, 132-136. 

F Hoecker, J Karger-Kocsis. Effects of matrix microstructure on the interfacial strength in GF/PP examined by a single fiber pull-out technique. Mekhanika Kom-pozitmykh Materialov 29 723-733, 1993. 

Casula MF, Concas G, Congiu F, Corrias A, Falqui A, Spano G (2005) Near equiatomic FeCo nanocrystalline alloy embedded in an alumina aerogel matrix Microstructural features and related magnetic properties. J Phys Chem B 109 23888-23895... 

Material lfpO.2 (Nmm ) (min.) (Nmm-2) (min.) As (%) (min.) Matrix microstructure Unspecified Material number Short code ... 

Microstructural constituents. A heterogeneous microstructure forms anodic and cathodic sites which promotes corrosion. The intermetallic precipitate serves as anodic and cathodic sites and they may be anodic or cathodic to the matrbc. For instance, a CuAl2 precipitate is cathodic to the aluminum matrbc and Mg2Si is anodic to the matrix. Microstructural variation plays a leading role in metal matrbc composites. For instance, A1 6013-SiC composite corrodes at the A1 matrbc/SiC interface because... 

It was observed that the kinetic parameters (the sinh term exponent and apparent activation energy) were similar between Eq 16 and like parameters for the 96.5Sn-3.5Ag solder as shown in Eq 13. In fact, a direct comparison of creep rates between the higher-order Pb-firee solders and 96.5Sn-3.5Ag solders at similar stresses and temperature indicated that the former were only slightly more creep resistant than the binary alloy. Quantitatively, that difference stemmed from the relatively small variations in a and the A constant. Mechanistically, it indicates that the AgjSn and Cu Snj phases did not have a significant role in the creep deformation, either explicitly or even indirectly, such as by altering the Sn-rich matrix microstructure. 

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