Northwestern University

Gm Global Technolgoy Operations, Inc.

Ping Guo

Blair E Carlson

Hui-ping Wang

Michael G Poss

Ange-Therese Akono

Guangze Li

Yunzhi Xu

Methods for the production of ceramic composites in which three-dimensional (3D) printed organic polymer fibers are embedded in an amorphous inorganic ceramic matrix are provided. The composites are made by electrospinning the organic polymer fibers and collecting them in a liquid or gel collector. Ceramic precursors added to the liquid collector after the fibers are collected, or present in the gel collector during the electrospinning, are then cured to form a solid ceramic matrix around the organic polymer fibers to produce an organic polymer fiber-reinforced ceramic.

Hierarchical organic-inorganic composites synthesized by electrospinning fibers within a non-conductive and a conductive pre-ceramic gel

A laser brazing and welding system is disclosed and includes: a laser; a first cutting tool including a first cutting tip; and a control module. The control module is configured to control the laser to laser braze or laser weld two parts; and control ultrasonic vibration of the first cutting tip to remove one or more layers from at least one of the two parts prior to or subsequent to the laser brazing or laser welding of the two parts.

Ultrasonic pre-surface and post-surface processing for laser brazing and laser welding

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Northfield, IL, United States of America

Ping Guo