Showing papers by "Joachim Heberlein published in 1997"
Patent•
28 Jan 1997TL;DR: In this article, a method and apparatus for the controlled synthesis and assembly of nanoparticles into nanostructured materials, including nanocomposites, includes a source of nanarticles and a hypersonic impaction apparatus.
Abstract: A method and apparatus for the controlled synthesis and assembly of nanoparticles into nanostructured materials, including nanocomposites, includes a source of nanoparticles and a hypersonic impaction apparatus. The nanoparticles are impacted on a substrate through hypersonic impaction to thereby provide nanostructured materials as well as nanophase materials.
111 citations
TL;DR: In this article, a thermal plasma seeded with vapor-phase precursors is supersonically expanded through a nozzle to nucleate ultrafine particles, which are then deposited by hypersonic impaction onto a temperature-controlled substrate.
62 citations
44 citations
TL;DR: In this article, hot isostalic pressing (HIP) treatment was applied to ZrO2 coalings to examine their microstructure, composition and fracture mode.
30 citations
TL;DR: In this article, the authors used TEM observations of a plasma-sprayed ZrO 2 -Al interface more than 20μm long to characterize the microstructural changes occurring during HIP treatment and to clarify the nature of the ceramic-metal interface.
17 citations
TL;DR: In this paper, a commercial torch has been modified to introduce an additional anti-vortex and shroud gas flow to counter the detrimental effects brought about by the vortex plasma gas flow which is used to stabilize the cathode arc attachment and to increase the anode life.
Abstract: A commercial torch has been modified to introduce an additional anti-vortex and shroud gas flow to counter the detrimental effects brought about by the vortex plasma gas flow which is used to stabilize the cathode arc attachment and to increase the anode life. Deposition efficiency and coating quality are used as criteria to judge the modified versus the nonmodified torch. High-speed videography and computerized image analysis systems are used to determine the particle trajectories, velocities, and the plasma jet geometry. The results show that the additional anti-vortex and shroud gas flow to the torch can keep the particles closer to the torch axis and reduce the amount of entrainment of cold air into the plasma jet. The consequence is that deposition efficiency and coating quality are substantially improved.
13 citations
15 Sep 1997
8 citations
15 Sep 1997
6 citations
15 Sep 1997
1 citations