scholarly journals EFFECT OF POROSITY ON PARTICLE EROSION WEAR BEHAVIOR OF LAB. SCALE SICF/SIC COMPOSITES

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2934-2939 ◽  
Author(s):  
MIN-SOO SUH ◽  
AKIRA KOHYAMA
Keyword(s):  
Wear Behavior ◽  
Engine Performance ◽  
Wear Test ◽  
Matrix Composites ◽  
Erosion Wear ◽  
Particle Erosion ◽  
Turbine Engine ◽  
Sic Fiber ◽  
Sic Composites ◽  
Silicon Based

The use of silicon-based ceramics and composites as combustor liners and turbine vanes provides the potential of improving next-generation turbine engine performance, through lower emissions and higher cycle efficiency, relative to today's use of super alloy hot-section components. As a series of research for FOD resistant, a particle erosion wear test was carried out for continuous Pre- SiC fiber-reinforced SiC matrix composites with a new concept of lab. scale fabrication by LPS process. The result shows that aperture (some form of porosity) between fiber and interface has a deleterious effect on erosion resistance. Aperture along the fiber interfaces consequently causes a severe wear in the form of fiber detachment. Wear rate increase proportional as contents of open porosity increases. For nearly full dense composite materials of about 0.5 % porosity, are about 200 % more wear-resistant than about 5 % porous composites. Grain growth and consolidate condition of matrix which directly affects to FOD resistant are also discussed.

Modeling the abrasive wear behavior of in-situ synthesized magnesium RZ5/TiB2 metal matrix composites

2021 ◽  
pp. 095440892110655
Author(s):  
Arabinda Meher ◽  
Manas Mohan Mahapatra ◽  
Priyaranjan Samal ◽  
Pandu R. Vundavilli
Keyword(s):  
Abrasive Wear ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Wear Test ◽  
Regression Equation ◽  
Matrix Composites ◽  
Worn Surface ◽  
Anova Technique

In the present study, the statistical analysis on tribological behavior of RZ5/TiB2 magnesium-based metal matrix composites is carried out using Taguchi design and analysis of variance (ANOVA) technique. Taguchi analysis using signal-to-noise ratio indicates that the sliding distance and wt.% TiB2 are the most significant factors in evaluating weight loss and coefficient of friction, respectively. The regression equation is formulated utilizing the ANOVA technique to study the output responses based on the input abrasive wear test experimental results. The regression equation is validated through a comprehensive study taking a series of abrasive wear tests and indicates the percentage deviation of regression modeling is in the range of ± 10%. The individual and combined effect of wear parameters on tribological behavior are investigated through the main effect plots and response surface plots. The micrograph of the worn surface of RZ5/TiB2 composites is studied using field emission scanning electron microscope (FESEM), indicating the formation of an oxide layer on the worn surface.

Tribological behavior of AA7075-TiC composites by powder metallurgy

2018 ◽  
Vol 70 (6) ◽  
pp. 1066-1071 ◽  
Author(s):  
Saravanan C. ◽  
Subramanian K. ◽  
Anandakrishnan V. ◽  
Sathish S.
Keyword(s):  
Powder Metallurgy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Process Condition ◽  
Wear Test ◽  
Matrix Composites ◽  
Content Type ◽  
Weight Percentage

Purpose Aluminium is the most preferred material in engineering structural components because of its excellent properties. Furthermore, the properties of aluminium may be enhanced through metal matrix composites and an in-depth investigation on the evolved properties is needed in view of metallurgical, mechanical and tribological aspects. The purpose of this study is to explore the effect of TiC addition on the tribological behavior of aluminium composites. Design/methodology/approach Aluminium metal matrix composites at different weight percentage of titanium carbide were produced through powder metallurgy. Produced composites were subjected to sliding wear test under dry condition through Taguchi’s L9 orthogonal design. Findings Optimal process condition to achieve the minimum wear rate was identified though the main effect plot. Sliding velocity was identified as the most dominating factor in the wear resistance. Practical implications The production of components with improved properties is promoted efficiently and economically by synthesizing the composite via powder metallurgy. Originality/value Though the investigations on the wear behavior of aluminium composites are analyzed, reinforcement types and the mode of fabrication have their significance in the metallurgical and mechanical properties. Thus, the produced component needs an in-detail study on the property evolution.

Influences of Thermal Molding Process on the Flexural Properties of SiC/SiC Composites with a New Precursor Polymer

2015 ◽  
Vol 816 ◽  
pp. 33-39
Author(s):  
Zheng Luo ◽  
Xin Gui Zhou ◽  
Jin Shan Yu ◽  
Fei Wang
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Molding Pressure ◽  
Flexural Properties ◽  
Cross Linking ◽  
Matrix Composites ◽  
Molding Process ◽  
Sic Fiber ◽  
Precursor Polymer ◽  
Sic Composites

Silicon carbide (SiC) fiber reinforced SiC matrix composites (SiC/SiC) were fabricated by precursor impregnation and pyrolysis (PIP) process with a new precursor polymer, liquid polyvinylcarbosilane (LPVCS). The molding process was conducted during the cross-linking reactions of LPVCS for the first PIP cycle. The influences of molding pressure and molding time on the flexure properties of the SiC/SiC composites were studied. The results indicated that the optimal molding pressure and molding time were 3MPa and 5h respectively due to the fine interfacial bonding between fiber and matrix. The density of the SiC/SiC composites was 2.16g/cm3. The flexural strength and fracture toughness of the SiC/SiC composites were 637.5MPa and 29.8MPa·m1/2 respectively.

Evolution in friction and wear of Mg–SiCp composites: Influence of fretting duration

2005 ◽  
Vol 20 (4) ◽  
pp. 801-812 ◽  
Author(s):  
B.V. Manoj Kumar ◽  
Bikramjit Basu
Keyword(s):  
Wear Behavior ◽  
Early Stage ◽  
Fatigue Cracks ◽  
Magnesium Silicate ◽  
Test Duration ◽  
Matrix Composites ◽  
Wear Properties ◽  
Tribochemical Reaction ◽  
Steady State Condition ◽  
Sic Composites

In the effort toward achieving lightweight, wear-resistant, composite materials, considerable effort, in recent times, has been put forward to develop Mg–SiC composites. The detailed wear mechanism of these newly developed composites is still unclear, and most of the work on metal matrix composites (MMC) to date has concentrated on evaluating the wear behavior of Al-based MMCs. In the present work, the influences of fretting test duration on the evolution of frictional behavior as well as wear properties were studied. The experimental results revealed that fluctuations in friction curve are significantly suppressed with highest reinforcement content (26.3 wt%) in composites while considerable fluctuations continue to exist even after achieving steady state condition in base Mg. In all the fretting contacts, tribochemical reactions were observed to be dominant wear mechanisms. In the early stage of fretting, oxidative wear dominates due to formation of MgO. As the fretting continues, MgO undergoes tribochemical reaction and forms soft, viscous hydrated magnesia. For base Mg, surface fatigue cracks were observed after a threshold number of cycles. In composites, the soft, viscous triboproducts (hydrated MgO and dense hydrous magnesium silicate) smear on the worn surfaces and decrease the friction coefficient.

Constituent Development for Higher-Temperature Capable Ceramic Matrix Composites

2018 ◽  
Author(s):  
M. K. Cinibulk ◽  
Z. D. Apostolov ◽  
E. E. Boakye ◽  
T. S. Key ◽  
D. S. King
Keyword(s):  
Stress Rupture ◽  
Ceramic Matrix Composites ◽  
Matrix Composites ◽  
Turbine Engine ◽  
Sic Fiber ◽  
The Matrix ◽  
Higher Temperature ◽  
Oxidation Resistant ◽  
Service Environments ◽  
And Behavior

This paper highlights research that is addressing the need for improved high-temperature-capable CMCs, with a focus on CMC constituents and an understanding of their processing, microstructure, and behavior in relevant service environments. The most pervasive lifetime and temperature limitations for SiC/SiC CMCs are related to oxidation, creep and stress rupture of the fibers, oxidation-induced instability of the fibermatrix interface, and instability of the matrix at temperatures > 1400°C. Consequently, we are addressing these shortcomings by developing technologies to enable higher-temperature capable SiC fiber, oxidation-resistant fiber-matrix interfaces, and improvements in processing of refractory matrices for both turbine engine and hypersonic applications.

PREDICTION OF FRICTIONAL AND WEAR BEHAVIOR OF ALUMINIUM MATRIX COMPOSITES BY ARTIFICIAL NEURAL NETWORK

2014 ◽  
Vol 02 (03n04) ◽  
pp. 1450004 ◽  
Author(s):  
VIKRAM G. KAMBLE ◽  
SAGAR G. KAMBLE ◽  
RAMESH K. D.
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Wear Behavior ◽  
Wear Test ◽  
Metal Alloys ◽  
Grain Size Analysis ◽  
Size Analysis ◽  
Matrix Composites ◽  
Artificial Neural ◽  
Artificial Neural Network Ann

Modern technologies require materials with unusual combination of properties that cannot be met by conventional metal alloys, ceramic, etc. In our work, we prepared the samples of metal alloys such as Al 356- TiB 2. Processing of samples is done by artificial neural network (ANN) which is one of the promising fields of research in predicting experimental results. In our investigation we worked on grain size analysis, micro hardness, regression analysis, friction test, wear test and microstructure analysis of samples to describe the materials properties of Al 356- TiB 2.

Preparation of silicon-based oxide layer on high-crystalline SiC fiber as an interphase in SiC/SiC composites

2004 ◽  
Vol 329-333 ◽  
pp. 554-557 ◽  
Author(s):  
N Igawa ◽  
T Taguchi ◽  
R Yamada ◽  
Y Ishii ◽  
S Jitsukawa
Keyword(s):  
Oxide Layer ◽  
Sic Fiber ◽  
Sic Composites ◽  
Silicon Based

Wear Characteristics of Al 6061 Reinforced with Graphite under Different Loads and Speeds

2011 ◽  
Vol 287-290 ◽  
pp. 998-1002 ◽  
Author(s):  
A. Baradeswaran ◽  
A. Elayaperumal
Keyword(s):  
Composite Material ◽  
Wear Behavior ◽  
Wear Test ◽  
Wear Loss ◽  
Dry Sliding ◽  
Matrix Composites ◽  
Atmospheric Conditions ◽  
Graphite Composite ◽  
Al 6061 ◽  
Pin On Disc

This work investigates Al 6061 alloy with graphite particle impregnated metal matrix composites under dry sliding conditions. The conventional casting techniques were used for preparing the composite material. Experiments were conducted under dry sliding conditions for determining the wear behavior of Al 6061 alloy- Graphite composite material with varying wt % graphite content under different sliding speeds and at different loads. Sliding distance of 250m was commonly used for the wear test. A pin on disc machine was used for conducting the wear test. The test was conducted under atmospheric conditions. Wear rate decreases with increased sliding speed and increases with increasing load. Worn surfaces of the composites were examined through scanning electron microscope. The wear loss of the composite material with 5Wt % graphite was found to be minimum with respect to sliding speeds and loads.

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