Intermetallic coating using a 3-dimensional micro welder

Kiyotaka Matsuura, Naoki Mizuta, Soshu Kirihara, Yoshinari Miyamoto, Atsushi Yumoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The authors have studied a new method of intermetallic coating using a small TIG welder. This method is based on a reaction between small liquid beads produced from very thin metal wire and the substrate metal surface. The authors designed a computer-aided 3-dimensional micro welder (3DMW) for a previous study on freeform fabrication of intermetallics, and have applied it to this study on intermetallic coating. In this study, a predetermined length of thin aluminum wire was fed onto the titanium substrate surface, and a spark was stricken from a thin electrode of a W-Ce2O3 alloy to make a small aluminum liquid bead on the titanium substrate surface and to simultaneously melt a small area of the substrate surface beneath the liquid bead. All process conditions had been programmed beforehand, including the length of the wire feeding per spark, the position of the electrode, electric power, movement of the stage holding the substrate, etc. The liquid bead containing aluminum and titanium rapidly solidified on the titanium substrate surface producing titanium aluminides on it. Repetition of the aluminum wire feeding, the electrode positioning and the spark striking produced a coating layer consisting of sub-layers of TiAl3, TiAl and Ti3Al from the surface side to the substrate side. Vickers hardness and wear resistance of the coated sample were remarkably improved.

Original languageEnglish
Title of host publicationMaterials Science Forum
Number of pages6
Publication statusPublished - 2010
Externally publishedYes
Event10th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials, MM and FGMs - Sendai
Duration: 2008 Sep 222008 Sep 25

Publication series

NameMaterials Science Forum
ISSN (Print)02555476


Other10th International Symposium on Multiscale, Multifunctional and Functionally Graded Materials, MM and FGMs



  • Rapid prototyping
  • Surface modification
  • TIG welding
  • Titanium aluminides

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Matsuura, K., Mizuta, N., Kirihara, S., Miyamoto, Y., & Yumoto, A. (2010). Intermetallic coating using a 3-dimensional micro welder. In Materials Science Forum (Vol. 631-632, pp. 259-264). (Materials Science Forum; Vol. 631-632).