Selective laser metal sintering is set to enable a burst of creativity for today's young gas turbine design engineers.
The sharpness and high intensity of Ni0 peaks may be indicating that the Ni metal sintering is unavoidable for this catalyst under the reaction conditions.
Control of precious metal sintering is considered to be one of the critical issues in the development of durable LNT catalysts.
Other mechanisms such as washcoat losses or abrasion, contamination by sulfur and lubricants, and noble metal sintering were also observed for different samples.
The metal particle size distributions corresponding to the reduced catalysts show that metal sintering is slight up to 973 K, with mean sizes ranging from 3.5 to 3.7 nm, and much stronger when the catalysts are reduced at 1173 K, mean size: 6.7 nm.
Direct metal laser sintering was used for fabrication of ribs with thicknesses varying between 0.2 and 3.0 mm as well as inclined ribs the with build angles of 30° and 45°.
The improved resistance of this catalyst to metal sintering and coking is interpreted in terms of the reactivity changes of the coke precursors induced by adsorbed sulfur as well as the lowest acidity of this catalyst.
Sintering is caused by mobility of the metal particles on the support surfaces.
Laser sintering is capable of producing all kinds of metal parts, including components made from aerospace-grade titanium.
