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A Cu interlayer and Cu-Zn filler metal were used for laser brazing of TC4 alloy to 304 stainless steel (SS). To avoid the formation of brittle Ti-Fe intermetallics, a new welding procedure for SS-Ti alloy joints was proposed. The laser beam was focused on the steel plate 0.3 mm away from the Cu interlayer for controlling Cu partial melting. The Cu-Zn filler melted occurred at the Cu-Ti interface through the heat transfer of unmelted Cu. The brazed weld with the main structures of α-phase (Cu, Zn), α-Cu, CuTi + Ti2Zn. At the brazed weld-TC4 alloy interface, the joint fractured with a maximum tensile strength of 108 MPa.

Laser welding-brazing of TC4 Titanium (Ti) alloy to 304 stainless steel (SS) has been applied using 38Zn-61Cu (wt%) alloy as filler metal. A new welding process for SS-Ti alloy joint was introduced on the basis of the controlling the formation of Ti-Fe intermetallics in the joint. One process was one pass welding involving creation of a joint with one fusion weld and one brazed weld separated by remaining unmelted SS. When laser beam on the SS side was 1.5 mm, SS would not be completely melted in joint. Through heat conduction, the filler metal melted occurred at the SS-Ti alloy interface. A brazed weld was formed at the SS-Ti alloy interface with the main microstructure of (Fe, Zn) + Fe3Zn7, β-CuZn and β-CuZn + Ti2Zn3. The joint fractured at the brazed weld with the maximum tensile strength of 210 MPa.

The electrodeposition of iron disulfide pyrite (FeS 2 ) thin films on indium–tin oxide (ITO) substrate in aqueous solution containing Na 2 S 2 O 3 ·5H 2 O, FeCl 2 ·4H 2 O reagents was investigated. The deposited material is successively annealed in sulfur atmosphere. In this way, we successfully obtained pyrite thin films with good quality. The structure, optical and electrical property analysis for the resulted films was carried out and some special results have been concluded.