Xin GAO
,
Yufeng ZHENG
,
Wei CAI
,
Su ZHANG
,
Liancheng ZHAO
材料科学技术（英）
The microstructure, phase transformation, compression property and strain recovery characteristics of equiatomic TaRu super high temperature shape memory alloy have been studied by optical microscope, XRD, DTA, compression tests and TEM observations. When cooling the alloy specimen from high temperature to the room temperature, (parent phase)→ (interphase)→ (martensite) two-step phase transformations occur. The microstructure at room temperature show regularly arranged band morphology, with the monoclinic crystal structure. The twinning relationship between the martensite bands is determined to be (101) of Type I. Reorientation and coalescence of the martensite bands inside the variant happened during compression at room temperature. The → reversible transformation contributes mainly the shape memory effect, with the maximum completely recovery strain of 2%.
关键词:
TaRu alloy
,
null
,
null
,
null
Xin GAO
材料科学技术（英）
980 nm InGaAs/GaAs separate confinement heterostructure (SCH) strained quantum well (QW) laser with non-absorbing facets was fabricated by using thermal treatment. Microchannel coolers with a five-layer thin oxygen-free copper plate structure were designed and fabricated through thermal bonding in hydrogen ambient. The highest CW (continuous wave) output power of 200 W for 5-bar arrays packaged by microchannel coolers was presented.
关键词:
High power
,
power
,
microchannel
,
coolers
,
stacked
