The fracture toughness of particulate-reinforced ceramics

1989 ◽  
Vol 40 (2) ◽  
pp. R27-R30 ◽  
Author(s):  
E. Smith
Keyword(s):  
Fracture Toughness ◽  
Particulate Reinforced

Development and Property Evaluation of Chilled MMC Prepared with LM25 as Matrix and SiO2 (Glass) Particulates as Dispersoids

2015 ◽  
Vol 1101 ◽  
pp. 85-88
Author(s):  
R. Suresh
Keyword(s):  
Fracture Toughness ◽  
Metal Matrix ◽  
Aluminum Matrix ◽  
Particulate Composite ◽  
Stir Casting ◽  
Volumetric Heat Capacity ◽  
Casting Technique ◽  
Property Evaluation ◽  
Particulate Reinforced ◽  
Test Result

Main objective of the present work is to investigate the effect of dispersiod content and the effect of chill on the mechanical properties of chilled MMC with LM25 as matrix and SiO2as dispersoid. Investigation is carried out to evaluate Ultimate Tensile Strength (UTS), Fracture toughness, Hardness, and microstructure of chilled aluminum matrix and Glass particulate composite. The glass (SiO2) particles ranging from 30-to100µm were chosen as dispersiod and added, ranging from 3to 12wt% in steps of 3%. The composite was prepared by stir-casting technique and poured into the sand molds incorporated with non-metallic and metallic chills. Test result showed that this MMC was greatly influenced by the dispersiod and chills. Fracture toughness & UTS of the composite are found to depend on the wt% of the dispersiod and chilling medium. It is observed that chill has influenced hardness of the composite. Volumetric heat capacity (VHC) of the chill is found to increase the amount of heat absorbed. Microstructure analysis has reveled uniform distribution of the dispersiod, which results in improved properties of the particulate reinforced metal matrix composite.

scholarly journals Fracture Toughness of Intermetallic Compound Particulate Reinforced Aluminum Alloy Die Castings.

1998 ◽  
Vol 64 (624) ◽  
pp. 2158-2163
Author(s):  
Kazumune KATAGIRI ◽  
Tadasi SATO ◽  
Koichi KASABA ◽  
Masami OKAWA ◽  
Yositaka SHOJI ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Aluminum Alloy ◽  
Intermetallic Compound ◽  
Die Castings ◽  
Particulate Reinforced

Influence of Cr2O3 Addition on the Properties of TiAl Composites

2011 ◽  
Vol 230-232 ◽  
pp. 789-792
Author(s):  
Jian Feng Zhu ◽  
Wen Wen Yang ◽  
Fang Ni Du
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Flexural Strength ◽  
Synthesis Method ◽  
Strengthening Mechanism ◽  
Reaction Synthesis ◽  
The Matrix ◽  
Method Effects ◽  
Particulate Reinforced

Using Ti, Al and Cr2O3 as starting materials, Al2O3 particulate reinforced TiAl composites have been fabricated by in-situ reaction synthesis method. Effects of the Cr2O3 addition on the microstructures and mechanical properties of the TiAl/Al2O3 composites were investigated in detail. The results show that the composites have a matrix of TiAl, Ti3Al, and minor Cr containing phases, and a second reinforcement Al2O3. The addition of Cr2O3 effectively refined the structure of the matrix, and as a result, the mechanical properties of TiAl composites are improved. At Cr2O3 7.36 wt%, the flexural strength and fracture toughness reach the maximum values of 634.62 MPa and 9.79 MPa·m1/2, which are increased by 80% and 30%, respectively. The strengthening mechanism is also discussed.

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