Sandvik Ab

Other

Asa Ekstrand

Gunnar Westin

Stefan S Ederyd

Mats Nygren

Udo K Fischer

Mats G Waldenstrom

Annika Pohl

Enrico Galli

A novel solution route has been developed that after heat-treatment to 500-600&#xb0; C. under inert atmosphere, yields highly porous composites of nano-sized metal (Ni) particle inclusions in ceramics (AlO). Metal loadings could be made from &#x3c;1% to &#x3e;95% Ni. The metal inclusion sizes in the Ni&#x2014;AlOsystem with the 10 atom % Ni sample were 4-7 nm, while for the 75 atom % Ni sample they were 5-8 nm. It was shown that the 10 atom % Ni sample could be used as a catalyst for the conversion of COand CHin the temperature range 550-700&#xb0; C., while higher temperatures led to growth of the Ni particles and carbon poisoning over time. The solution routes could also be deposited as thin dense films containing &#x3c;10 nm Ni particles. Such films with high Ni-particle loadings deposited on aluminium substrates have shown very good solar heat absorber proficiency and provide good substrates for carbon tube growth.

Composite materials and method of its manufacture

Method of coating cutting inserts

A method wherein one or more metal salts of at least one iron group metal containing organic groups are dissolved and complex bound in at least one polar solvent with at least one complex former comprising functional groups in the form of OH or NR.sub.3, (RH.dbd.H or alkyl). Hard constituent powder and, optionally, a soluble carbon source are added to the solution. The solvent is evaporated and the remaining powder is heat treated in an inert and/or reducing atmosphere. As a result, coated hard constituent powder is obtained which after addition of a pressing agent can be compacted and sintered according to standard practice to a body containing hard constituents in a binder phase.

Method of making metal composite materials

Growing community of inventors

Hasselby, Sweden

Asa Ekstrand