Welding TiB₂ Ceramies and Metai Mo with Combustion Reaction Technology

Daihua HE, Zhengyi FU and Qingjie ZHANGState Key Lab. of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

摘 要：<正>Combustion reaction welding, one promising method to weld ceramies and metals, was used to weld TiB2 and Mo. The results showed that the reacted products through combustion reaction were TiB2 and MoB when the Mo contents in reactants were 20 wt pct and 40 wt pct while there was Mo besides MoB and TiB2 when there were 60 wt pct and 80 wt pct Mo in reactants. Diffusion of elements occurred at the interfaces of the two substrates. The interfaces between the reacted and the two substrates were indistinct after being welded. The welding temperature strongly affected properties of the samples. The value of bending strength of the sample with 80 wt pct Mo in reactant welded at 1500℃ was the highest, 368.52 MPa. The highest value of shear strength among all the samples was that of the one with 40 wt pct Mo in reactant vvelded at 1500℃, 50.97 MPa.

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