Yuhong ZHAO
,
Hua HOU
,
Hong XU
,
Yongxin WANG
,
Zheng CHEN
,
Xiaodong SUN
材料科学技术（英文）
The atomic scale computer simulation for initial precipitation mechanism of Ni75Al6V19 alloy was carried out for the first time by employing the microscopic diffusion equation. The initial precipitation process was investigated through simulating the atomic pictures and calculating the order parameters of the two kinds of ordered phases. Simulation results show that the ordered phase precipitated earlier than θ ordered phase by congruent ordering+spinodal decomposition mechanism and thus produced a nonstoicheometric single ordered phase. Then, the nonstoichiometricθphase precipitated by a non-classical nucleation and growth mechanism at the APBS of phase.
关键词:
Precipitation mechanism
,
null
,
null
Chuanli QIN
,
Dongyan TANG
,
Jun CAI
,
Jusheng.ZHANG
,
Weimin CAI
,
Xiaodong SUN
材料科学技术（英文）
Polyurethane/(vinyl ester resin) interpenetrating polymer network (PU/VER IPN) materials with broad temperature ranges and excellent damping properties from low temperature to room temperature were prepared. The influence of comonomers and component ratios on the compatibility and damping properties of IPN materials was studied by DMA which indicates that such properties are improved by introducing acrylic esters instead of polystyrene (PSt) into VER comonomer system. The detected results of microstructure by AFM show that the phase ranges of the dual-phase continuous IPN materials obtained are both in nanometer scale. The results of mechanical properties show that IPN materials show the regulation from elastic deformation to brittle deformation with the increase of VER
proportion.
关键词:
Interpenetrating polymer network
,
null
,
null
,
null
