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melt[53] (Condition: S0/(S1+S2)=1.0, L0/D0=12, θ=75°, temperature of 1400 ℃, 2.5 atmospheres) 图27 原位复合Cu-TiB2材料TEM像[53] Fig. 27 TEM images of in-situ composite[53] Cu-Ti和Cu-B双束熔体原位反应热力学研... and in situ reaction mechanisms in preparing Cu-1.6 wt% TiB2 alloys[J]. Materials Chemistry and Physics, 2013, 138(1): 95-101. [48] MORRIS M, MORRIS D. Microstructural refinement and associated strength......
of the most common problems encountered when TBM tunneling in massive and hard rocks, particularly where there is a high in-situ stress [27-29]. It refers to the damage to an excavation that occurs......
