Iranian Journal of Materials Science and Engineering

Highlights:

·  A 3D orthogonal woven C/C-SiC-ZrB2 composite was fabricated using I-CVI, SI, and LSI.
·  The composite showed superior ablation resistance compared to C/C and C/C-SiC.
·  ZrB2 incorporation reduced ablation rates by forming a protective ZrO2 layer.
·  Residual Si melted at high temperatures, creating a protective SiO2 layer.
·  The ZrO2 layer blocked oxygen penetration and improved oxidation resistance.
 

Highlights

1. Ni-(Ti,W)C composite coating was electroplated on the AISI 304 stainless steel.
2. The results of SEM/EDS revealed the current density of 40 mA/cm² as the optimal value.
3. The findings from polarization tests revealed that the corrosion behavior of both the substrate and the coating was active-quasi passive.

•    Amber glass powder seems to be similar to that of dental ceramic in the morphology, structure, thermal behaviour, and non-hazard level of ion release.
•    Vickers hardness of the ceramic-amber material was enhanced in comparison to dental ceramic.
 





















Highlights of conclusion
•    Amber glass powder seems to be similar to that of dental ceramic in the morphology, structure, thermal behaviour, and non-hazard level of ion release.
•    Vickers hardness of the ceramic-amber material was enhanced in comparison to dental ceramic.
 



































 

• The highlight of the present study is to fabricate a dissimilar joints of AA2219 and Ti-6Al-4V alloys using the vacuum diffusion bonding method.
• To study the effect of the bonding pressure on the microstructure of the dissimilar metals like AA2219 and Ti-6Al-4V alloys joint
• The bonding pressure is controlled in the range of 1-4 MPa by keeping the bonding temperature and holding time constant.
• The influence of the bonding pressure on the microstructure and mechanical properties of the bonding joints is investigated.
• The diffusion behaviour across the interface of the bonding joints is increased with the increase in bonding pressure.
• The interface morphology of the specimen bonded at lower bonding pressures exhibits scraggly voids and cracks.
• The irregular voids and cracks are squeezed and gradually closed due to the significant increase in the diffusion between Al and Ti.
• The maximum shear strength of 81 MPa is obtained for the joint made at the bonding pressure of 4 MPa, and a diffusion layer of 0.76 µm is formed at the Ti side interface.
• The fracture morphology inferred the brittle failure of the bonding joints due to the formation of intermetallic compounds like TiAl, TiAl₂, and TiAl₃ at the interface of Al and Ti.

   
 

Highlights

 

• Basic surface functional groups on derived activated carbon are retained with main of carbonate after activation process.
• The methylene blue adsorption of derived activated carbon showed favorable the Langmuir isotherm with 96.36%-97.74% removal.
• The surface character of derived activated carbon showed large channel tube with 1.88-2.64 nm. average pore widths.
• Optimum treatment for tamarind derived activated carbon production is 3 wt.% NaCl and 600 W microwave power.
•  The activation with microwave-assisted NaCl for activated carbon production is feasible for commercial production.