"Electrical properties of Thermally sprayed Ni- and Ni20Cr-based resistors".

Five laboratories were asked to deposit Ni and Ni20Cr powders to obtain resistors. We studied their electrical properties in the temperature range 20-500[degrees]C and interpreted the results in the light of their microstructure. Resistors sprayed from Ni powders consist in [NTiO.sub.x] islands embedded in a Ni matrix. The temperature dependence of resistance (TCR), is in perfect agreement with that of pure nickel, indicating that the matrix determines the electrical transport. Annealing at temperatures from 200 to 400[degrees]C results in an irreversible decrease of resistance. A multiphase microstructure is observed in resistors prepared from 80Ni20Cr powders. The major phase in these resistors is a NiCr alloy but with a Ni:Cr ratio larger than 80:20. Minor amounts of metal oxides are also detected. The TCR in these samples ranges from 180 ppm/[degrees]C to 2830 ppm/[degrees]C, and is attributed to different degree of oxidation and segregation of the metals in the alloy.

[ILLUSTRATION OMITTED]

The Journal of Thermal Spray Technology (JTST), the official journal of the ASM Thermal Spray Society, publishes contributions on all aspects--fundamental and practical--of thermal spray science, including processes, feedstock manufacture, testing, and characterization. As the primary vehicle for thermal spray information transfer, its mission is to synergize the rapidly advancing thermal spray industry and related industries by presenting research and development efforts leading to advancements in implementable engineering applications of the technology.

[ILLUSTRATION OMITTED]

Several articles from the September issue 17(3), as selected by JTST editor Christian Moreau, are highlighted here. Dr. Moreau has announced that the September issue will contain a special section of papers dealing with "thick coatings" that originated from the 2007 European Congress on Advanced Materials Processes (Euromat). Guest editor for this special section is Prof. Christian Coddet, LERMPS Laboratory, Belfort-Montbeliard University of Technology, who together with Prof. K. Mohwalk, Leibniz University, chaired the session on "Thick Coatings Developments and Technology."

In addition to the print publication, JTST is available online through www.springerlink.com. For more information, visit www.asminternational.org/tss.