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Titanium oxide film with a graded interface to NiTi matrix was synthesized in situ on NiTi shape memory alloy(SMA) by oxidation in H2O2 solution. In vitro studies including contact angle measurement, hemolysis, MTT cytotoxicity and cell morphology tests were employed to investigate the biocompatibility of the H2O2-oxidized NiTi SMAs with this titanium oxide film. The results reveal that wettability, blood compatibility and fibroblasts compatibility of NiTi SMA are improved by the coating of titanium oxide film through H2O2 oxidation treatment.

A low-temperature and large-area blackbody radiant source with an operating temperature between −50 and +50°C is reported. The source consists of a honeycomb cavity array which is mounted on a specially designed heat pipe. The array provides a high emissivity (calculated to be 0.995). Experimental results show that this source has excellent temperature uniformity, rapid response to temperature change, and generates no noise, vibration or particulate contamination.

The general G-K relation has been obtained and the nonlinear energy method generalized to analyzing the mixed mode fracture problem by W. Shen and James D. Lee. For the special case in which the line crack is perpendicular to one of the major loading axes, it has been found that the linear energy release rate is independent of the biaxial load factor while the nonlinear energy rate depends on it. In this paper, based on the nonlinear energy method for mixed mode fracture, the calculations for the pro cess of the nonlinear rate of off-axis cracked lamina of composite material subjected to biaxial loading have been performed. In addition, several examples have been given to explain the influence of fiber-orientation, biaxial loading factor and how the nonlinear correction factors vary with changes of the applied load.