Crack-free Cu alloy coating has been fabricated on Al substrate with the existence of a Ag buffer layer. The had 12 at.% and 45 Ag, which contributed to formation solid solution eutectic phase (transformation temperature 780 °C). was characterized as finer solution. layer main contents Ag2Al solution, it not only hindered brittle intermetallic compounds (IMCs)but also reduced thermal stress its...

Laser coating is a material placement technique wherein powder melted using laser to coat portion of substrate. In this study, cladding and its applications are reviewed. First, background the important parameters highlighted. Then, control procedure criticized. As an example process, titanium alloys investigated. Finally, on gas turbine engines, dies drilling spindles, tools, blades

Improving the wear resistance and corrosion of high-speed steel (HSS), WC/diamond/Co-based gradient composite coatings were produced on HSS substrates by laser cladding with different composition powder mixture (Co-Cr alloy powder, 80Co-Cr powder+20WC, 53Co-Cr powder+40WC+7diamond, wt%). The macromorphology, microstructures, phase characterized optical microscope (OM), scanning electron microsc...

Characteristics of cladding modes in a photonic crystal fiber (PCF) are numerically analyzed using the plane wave expansion method. The presence of the outer silica ring in the PCF tends to push the optical fields of the cladding modes toward the rim of the PCF, which creates 'ring modes' whose fields are tightly confined in the outer ring. The dispersion of the cladding modes are determined ma...

The accident-tolerant fuel concept involves replacing the conventional cladding system (zirconium) with a new material or coating that has specific thermomechanical properties. aim of this study is to evaluate neutronics performance chromium and design solutions. A Zircaloy–uranium (Zr–U) currently used as standard in pressurized water reactors around world. This investigation presents benefits...

To reduce the thermal stress at clad layer and further crack generation in laser cladding process, a method of controlling cracks by changing energy density is proposed. Comparative thermal–mechanical coupling finite element analysis was performed on uniform rectangular convex shape beam spot processes plasma-sprayed MCrAlY coating through numerical simulation based ANSYS software. Results show...

Nowadays, high-entropy alloys (HEAs) have become a hot research topic in the field of coating materials. However, HEAs large wide range compositional systems, and differences their composition inevitably lead to significant variations matching process parameters laser cladding post-treatment methods, which turn give coatings broad microstructures protective properties. Therefore, it is crucial ...

Plasma cladding coupled induction heating was developed and successfully used to fabricate Ni60A coating on the surface of copper pipe. By matching swing arc with rotating pipe, efficiency as high 32.72 mm2/s. From head tail coating, wear resistance changed from 4.5 1.8 times that pure copper. During process constant current, temperature zone bath depth gradually increased. The corresponding di...

There is a growing interest in enhancing the bioactivity of TC4-based metallic biomaterials, which are known for their excellent biocompatibility. Bioactive glass (BG) has been recognized its high potential promoting bioactivity, particularly osteo tissue engineering. This study focuses on investigating influence BG addition microstructure and electrochemical properties TC4 coatings. The TC4/BG...

In order to solve the problem of trajectory planning robotic plasma cladding for complex surface coating, concept non-uniform rational B-spline (NURBS) function open-/closed-loop mapping is proposed firstly in this work explore new approach NURBS surfaces. The carried out by a 2D-NURBS curve C(u) on 2D plane, which mapped predefined 3D-NURBS S(u,v) using form 3D named (NURBS-FM) curve. Using fi...