Shanghua Wu

Title: Innovations of Shanghua Wu in Ceramic and Cutting Tool Technologies

Introduction

Shanghua Wu is a notable inventor based in Dongguan, China, recognized for his contributions to the fields of ceramics and cutting tool technologies. He holds two patents that showcase his innovative approaches to material fabrication and tool design. His work emphasizes efficiency and cost-effectiveness in manufacturing processes.

Latest Patents

One of his latest patents is a method of making textured ceramics. This invention proposes a novel hot pressing flowing sintering method to fabricate textured ceramics. The perfectly 2-dimensional textured Si3N4 ceramics, with a Lotgering orientation factor fL of 0.9975, were fabricated by this method. During the initial sintering stage, the specimen flowed along the plane which is perpendicular to the hot pressing direction under pressure, through the controlling of the graphite die movement. The rod-like β-Si3N4 nuclei were easily textured during the flowing process, due to their small size and the high porosity of the flowing specimen. After alignment, the β-Si3N4 grains grew along the materials flowing direction with little constraint. The textured Si3N4 ceramics fabricated by this invention also showed a high aspect ratio. Compared to the conventional hot-forging technique, which contained the sintering and forging processes, the hot pressing flowing sintering proposed is simpler and lower cost to fabricate textured Si3N4.

Another significant patent involves an AlO-coated SiN cutting tool. This invention provides a SiN-based substrate body with a coating layer, wherein the coating layer has at least one AlO coating layer consisting of amorphous AlO or nanocrystalline α-, γ-, or κ-AlO. The hard and wear-resistant refractory coating is deposited onto the SiN-based substrate body by reactive sputtering using bipolar pulsed DMS technique or dual magnetron sputtering method at substrate temperatures of 300-700°C. During the deposition, the substrate temperature is controlled to achieve the desired crystal structure of the coating. The coated cutting tools of this invention are suitable for high-speed machining of metals by turning, milling, drilling, or other similar chip-forming machining methods.

Career Highlights

Shanghua Wu has worked at prominent institutions such as Guangdong University of Technology and Dongguan South China Design and Innovation Institute. His experience in these organizations has contributed to his expertise in material science and engineering.

Collaborations