MCD Approach for Assessing the Optimal Operating Condition during Sliding Wear Characteristics of LM25/SiC AMCs Processed by an Improved Stir Casting Technique

This investigation studied the effect of Al2O3 reinforcement on sliding wear (dry) characteristics of Al–25Zn/Al2O3 composites at various temperatures, speeds, and loads applied for 1400 m sliding distances as per the Taguchi L16 orthogonal array using a tribometer with an Emergency Number24 shaft steel disk. Al–25Zn alloy-based composites reinforced with 10, 15, and 20 wt% of Al2O3 particles were fabricated by the stir casting technique. The results show a significant alteration in mechanical and tribological properties with reinforcement of Al2O3 content. The optimum mechanical and sliding wear properties are seen for the composite with 10 wt% of Al2O3. The material removal in the matrix alloy is due to adhesion and in composites mainly due to abrasion and delamination. The developed regression model and the artificial neural network model can forecast the composite's wear behavior with good precision.

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A Study on the Optimal Operating Condition of a Dual Fluidized-Bed (DFB) with Biomass and SRF

New & Renewable Energy ◽

10.7849/ksnre.2016.12.12.4.077 ◽

2016 ◽

Vol 12 (4) ◽

pp. 77

Author(s):

Hyungchul Yoon ◽

Sungho Cho ◽

Dockjin Lee ◽

Goyoung Moon ◽

Soonhaing Cho

Keyword(s):

Fluidized Bed ◽

Optimal Operating ◽

Operating Condition ◽

Optimal Operating Condition ◽

Dual Fluidized Bed

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Analysis on sliding wear behavior of Al + B4C+ mica hybrid metal matrix composites

Materials Express ◽

10.1166/mex.2020.1751 ◽

2020 ◽

Vol 10 (7) ◽

pp. 986-997

Author(s):

K. Velavan ◽

K. Palanikumar

Keyword(s):

Boron Carbide ◽

Metal Matrix Composites ◽

Metal Matrix ◽

Sliding Wear ◽

Wear Behavior ◽

Stir Casting ◽

Dry Sliding Wear ◽

Wear Loss ◽

Matrix Composites ◽

Casting Technique

In this investigation, wear behavior of hybrid aluminum metal matrix composites (HMMCs) fabricated by stir casting technique is carried out. Boron carbide and Mica particles are added. The Mica percentage varies from 3–5% in steps of 1% with a constant reinforcement quantity of 10% boron carbide. The dry sliding wear experiments are explored on a pin on disc tribometer. The process variables considered for the study are: Mica mass fraction, sliding speed, load and sliding time, and the response analyzed is wear loss. Box-Behnken design is used for conducting the experiments. The result shown proves that 3% of Mica particle inclusion reduces the wear due to the increase in density. Further increase of mica does not improve the wear resistance. ANOVA results indicate that load and % of Mica are the profoundly influencing parameters. The pin surface is analyzed by using a Scanning Electron Microscope.

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Effects of influent COD/N ratio and internal recycle ratio on nitrogen removal efficiency in the KNR process

Water Science & Technology ◽

10.2166/wst.2006.282 ◽

2006 ◽

Vol 53 (9) ◽

pp. 265-270 ◽

Cited By ~ 3

Author(s):

C.W. Suh ◽

S.H. Lee ◽

H.S. Jeong ◽

J.C. Kwon ◽

H.S. Shin

Keyword(s):

Carbon Source ◽

Removal Efficiency ◽

Nitrogen Removal ◽

Denitrification Rate ◽

Optimal Operating ◽

Operating Condition ◽

Optimal Operating Condition ◽

External Carbon Source ◽

Recycle Ratio ◽

Removal Efficiencies

In this study, with the KNR® process that has many advantages, the nitrogen removal efficiency of KNR was experimentally investigated at various COD/N ratios of influent conditions. The optimal operating condition of internal recycle ratio was evaluated. The TN removal efficiencies were 59.1, 72.5 and 75.9% at the COD/N ratios of 3, 5 and 7, respectively. These high removal efficiencies resulted from high denitrification rate in UMBR with high microorganism concentration. Furthermore, specific endogenous denitrification at MLVSS of 10.3 g/L that is similar to MLVSS in UMBR was over two times higher than that at MLVSS of 2.06 g/L. This result suggests that endogenous denitrification rate in UMBR is so high that the requirement of an external carbon source can be saved. As the internal recycle ratio increased from 100 to 400%, the TN removal efficiency also improved from 69.5 to 82.9%, and the optimal internal recycle ratio was 300%.

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