1) fine copper powder
The changes of morphology and structure of fine copper powder during oxidization process were observed by SEM and TEM,and their weight gain processes were measured by thermal gravity analyser (TGA).
2) fine bronze powder
Properties and application of PTFE filled with fine bronze powder;
3) ultrafine copper powder
Preparation of ultrafine copper powder with hydrazine hydrate as reducing agent;
Because of special physical and chemical properties, ultrafine copper powders have been used in many kinds of fields, such as conduction materials, catalysts, lubricant addition, nanocrystalline copper materials, medicine and so on.
The activation pretreatment of copper concentrate has been done by high energy ball mill,and ultrafine copper powder with average size less than 10 μm has been prepared by directly using copper concentrate and ultrasonic slurry electrolysis.
4) micron copper powder
Self-repair of micron copper powder in greases was investigated by way of friction test and service life of bearing test.
The tribological properties and the anti-wear of micron copper powder in greases are investigated by four-ball test.
The heat transfer of the natural convection of horizontal micro-wire with different outer diameters is experimentally investigated by using the Joule heating.
6) Ultrafine Cu-Zn powder
The methods of thermal spray and mechanical ball milling were combined in this paper and a new method of preparation of ultrafine Cu-Zn powder was brought forward.