One-step fabrication of the wear-resistant superhydrophobic structure on SiCp/Al composite surface by WEDM

Magnetron sputtering is a powerful process for the production of thin films and coatings employed for the surface modification of tools and engineering components in various industrial sectors. Nanostructured coatings for multifunctional applications were deposited by means of magnetron sputtering by adjusting the experimental parameters in order to tailor the chemistry, the microstructure and the morphology of the coatings. Among the several systems that were investigated, TiC–TiB2 for wear applications were successfully tested. TiC–TiB2 coatings were deposited on a hardmetal WC–Co substrate in an unbalanced DC magnetron sputtering system starting from composite targets fabricated by the Self-propagating High-temperature Synthesis (SHS) consolidation method, involving the material synthesis and densification in one step. The results, showing the achievement of nanostructured films with thickness ranging between 1 and 2 µm, are here presented. The properties evaluated on the developed films (hardness, adhesion, friction coefficient and volumetric wear) are promising for the improvement of wear-resistant applications.

Download Full-text

Development of wear resistant composite surface on mild steel by laser surface alloying with silicon and reactive melting

Materials Letters ◽

10.1016/j.matlet.2008.06.042 ◽

2008 ◽

Vol 62 (27) ◽

pp. 4257-4259 ◽

Cited By ~ 15

Author(s):

Jyotsna Dutta Majumdar

Keyword(s):

Mild Steel ◽

Laser Surface ◽

Surface Alloying ◽

Composite Surface ◽

Wear Resistant ◽

Laser Surface Alloying

Download Full-text

Metallization of diamond/Al composite surface with Ni-P coating

2017 18th International Conference on Electronic Packaging Technology (ICEPT) ◽

10.1109/icept.2017.8046494 ◽

2017 ◽

Author(s):

Qi-Yuan Shi ◽

Di Wu ◽

Ding-rui Ni ◽

Dong Wang ◽

Zhi-Quan Liu

Keyword(s):

Composite Surface ◽

Al Composite

Download Full-text

TiAl-Based Materials by In Situ Selective Laser Melting of Ti/Al Reactive Composites

Metals ◽

10.3390/met10111505 ◽

2020 ◽

Vol 10 (11) ◽

pp. 1505

Author(s):

Andrey A. Nepapushev ◽

Dmitry O. Moskovskikh ◽

Ksenia V. Vorotilo ◽

Alexander S. Rogachev

Keyword(s):

Selective Laser Melting ◽

High Energy ◽

Composite Particles ◽

Exothermic Effect ◽

Laser Melting ◽

Intermetallic Materials ◽

Al Composite ◽

High Laser ◽

One Step ◽

Energy Ball

Additive manufacturing (AM) of refractory materials requires either a high laser power or the use of various easily melting binders. In this work, we propose an alternative—the use of spherical reactive Ti/Al composite particles, obtained by preliminary high-energy ball milling. These powders were used to produce high-temperature TiAl-based materials during the selective laser melting (SLM) process. When laser heating is applied, mechanically activated composite particles readily react with the release of a considerable amount of heat and transform into corresponding intermetallic compounds. The combustion can be initiated at relatively low temperatures, and the exothermic effect prevents the sharp cooling of as-sintered tracks. This approach allows one to produce dense intermetallic materials with a homogeneous structure in one step via SLM and eliminates the need for powerful lasers, binders, or additional post-processing and heat treatments.

Download Full-text

A One-Step Method for Fabrication of Wear-Resistant Amphiphobic Microdimple Arrays Using Under-Liquid Laser Machining

Coatings ◽

10.3390/coatings10060559 ◽

2020 ◽

Vol 10 (6) ◽

pp. 559 ◽

Cited By ~ 1

Author(s):

Pengcheng Sun ◽

Xiuqing Hao ◽

Sinong Xiao ◽

Yusheng Niu ◽

Liang Li ◽

...

Keyword(s):

Laser Processing ◽

Processing Parameters ◽

Laser Machining ◽

Textured Surface ◽

Self Healing ◽

Single Factor ◽

Step Method ◽

Wear Resistant ◽

One Step ◽

Liquid Laser

A one-step method using under-liquid laser machining (ULLM) is proposed for fabrication of microdimples on a cemented carbide surface with a wear-resistant amphiphobic property. The influence of laser processing parameters on the depth, width, and surface roughness (Ra) of the microstructures were investigated through single-factor experiments. On the basis of single-factor experiments, multiobjective optimization was carried out so that a desired surface morphology can be achieved. The model describing the relationships between laser processing parameters and corresponding responses was developed based on response surface methodology (RSM), and the adequacy of the model was assessed by analysis of variance (ANOVA) and verified experimentally. Subsequently, the desired microstructure arrays were then fabricated with the optimal processing parameters. Finally, the wear-resistant behaviors were comparatively studied for two kinds of amphiphobic surfaces by rubbing multiple times using 1000 grit metallographic sandpaper. The textured surface fabricated using the ULLM method exhibits excellent mechanical rubbing resistance as it maintains its amphiphobic character even after rubbing 300 m under the pressure of 2.4 MPa. This facile and low-cost method can be not only easily extended to other materials but also applied to fabricate amphiphobic surfaces with wear-resistance and self-healing properties.

Download Full-text