Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《材料研究学报》
Abstract： The in vitro biocompatibility of a novel magnesium phosphate whisker (M-PW) was evaluated by real-time cellular analysis (RTCA) and Annexin-V/PI double marking methods, and its antibacterial property was evaluated by co-culture method. Results show that the in vitro biocompatibility of the MPW decreased with the increase of M-PW in the suspensions. It possessed excellent in vitro biocompatibility for the suspensions containing 500 μg/mL or lower amount of the M-PW. It had no toxic effect on osteoblast cells for the suspension with 50 and 200 μg/mL of M-PW respectively. The antibacterial efficacy of the suspensions increased with the increasing amount of M-PW. The antibacterial efficacy against Escherichia coli and Staphylococcus aureus achieved 96.84% and 99.93％ respectively for the suspension with 500 μg/mL of M-PW, demonstrating that the novel phosphorous-magnesium whisker possesses excellent antibacterial property.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《材料研究学报》
Abstract： The cold rolling with different reduction degrees for a new type high- nitrogen nickel- free stainless steel was conducted, then the cold deformation performance and its effect on the friction wear property for the steel were studied. The results showed that the microstructure of the steel was stable and there was no strain-induced martensite even by the maximum deformation of 60%. As the cold deformation increased, the strength and hardness of the steel increased rapidly while the elongation and workhardening exponent decreased gradually. There existed a trend that the wear rate of the steel decreased firstly and then increased with the increasing cold deformation, whilst, the best wear resistance can be achieved by 20% cold deformation for the loads of 2 N and 5 N, and by 40% cold deformation for 10 N, respectively. Moreover, the main wear mechanism of the high- nitrogen nickel- free stainless steel changed from abrasive wear, oxidation wear and brittle flaking to abrasive wear and brittle flaking with the increasing cold deformation and load.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-18 Cooperative journals: 《材料研究学报》
Abstract： The in vitro biocompatibility (i.e. the cell proliferation and apoptosis of L929 cells) of 4 cast dental alloys (CoCrMo+1%Cu, CoCrMo+2%Cu, CoCrMo+3%Cu and CoCrMo) were evaluated by CCK-8 and Annexing-V/PI double marking methods to provide a biology reference in the clinical application of prosthodontics. Results show that the in vitro biocompatibility of 4 alloys decreases according to following sequence: CoCrMo+1%Cu, CoCrMo+2%Cu, CoCrMo and CoCrMo+3%Cu. However, the cytotoxicity grades of the 4 alloys are all ranked in level one, implying they are good enough in vitro biocompatibility.
Subjects: Materials Science >> Materials Science (General) submitted time 2017-03-31 Cooperative journals: 《金属学报》
Abstract：采用真空感应炉制备316L-50Mn初始合金，然后通过真空环境下Mn升华去合金制备多孔不锈钢，应用SEM、EDS和XRD等对物理真空去合金工艺方法制备的多孔不锈钢进行分析，并研究去合金过程中温度以及时间对孔的形成、发展以及孔的形貌的影响。结果表明，物理真空去合金工艺可以制备多孔不锈钢，其孔隙率为30%~60%，孔径为0.5~3 μm，多孔层深度达到15~55 μm。真空热处理温度和时间是物理真空去合金制备方法的2个关键因素，处理温度主要通过影响Mn元素挥发和体扩散速率进而影响孔的形貌，而处理时间对多孔层的深度起到主要作用。
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