ENVIRONMEMTAL EMBRITTLEMENT AND HYDROGEN DIFFUSION IN Co_3Ti ALLOYS
Co3Ti金属间化合物的环境氢脆及氢扩散

The effect of boron doping on the sensitivity to environmental embrittlement of Co3Ti alloys was investigated. The results show that the boron doping in Co3Ti does not have the effect on suppressing environmental embrittlement. The hydrogen diffusion coefficients in Co3Ti alloys with and without boron measured by a new experimental method have almost the same value, which indicates that boron in Co3Ti alloys does not reduce the hydrogen diffusivity along the grain boundaries. The susceptibility of boron-doped Co3Ti alloys to moisture-induced environmental embrittlement is attributed to no boron atoms segregating to the grain boundaries.