Chung-Shan Institute of Science and Technology, Armaments Bureau, M.n.d

Pai-Lu Wang

Cheng-Huan Wang

Chun-Han Lin

Dar-Ping Juag

Chia-Wei Liao

Ching-Jang Lin

Mau-Yi Huang

Chung-An Wang

Chuen-Ming Gee

Shyh-Jang Sun

In a method of fabricating graphite flakes applied in a graphite nanomaterial, mesophase pitch and an organic solvent are used to produce a carbon precursor slurry, and the carbon precursor slurry is coated by a scraper to produce the graphite flakes. Since the method of using natural graphite as a raw material in production requires a number of purification processes to manufacture an expanded graphite powder before the graphite flakes can be produced, and thus the fabricating cost is very high, and other high-priced materials such as polyimide (PI) or graphene also will increase the total cost.

Method of fabricating graphite flakes

A manufacture method of a three dimensional (3D) braided composite tube with a throat section includes: providing an assembled mandrel comprising an upper mandrel and a lower mandrel, and braiding an 3D braided inner layer on the upper mandrel; winding fiber yarns to form a fiber yarn layer over the 3D braided inner layer; tightening the 3D braided inner layer to the assembled mandrel by an appropriate tension force when winding; and infiltrating resin and increasing temperature to cure the resin for obtaining a composite tube with a narrower throat section. The present invention takes advantage of winding fiber yarn outer layer to keep the radius of the throat of the 3D braided inner layer to meet design requirement. Additionally, the hoop strength of the throat section is increased so that the metal shell can be made thinner to reduce the weight of the rocket nozzle.

3D braided composited tubes with throat sections and manufacture method thereof

Growing community of inventors

Taoyuan County, Taiwan

Pai-Lu Wang