Wuming LIU+
,
Shaoyun FU
,
Benlian ZHOU
,
International Centre for Materials Physics
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
110015
,
China
材料科学技术（英文）
Intrinsic localized modes in an order-parameter-preserving antiferromagnet are investigated with employing the Dyson-Maleev transformation and the coherent-state ansatz. These modes which be- low the magnon frequency band correspond to a local large-angle, low-frequency precessional mo- tion of spins, quantum states of which are characterized by the indefiniteness of the number of rele- vant magnons.
关键词:
intrinsic localized mode
,
null
,
null
Yuqing WANG+
,
Benlian ZHOU
,
Zuoming WANG
,
Changxu SHI
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
110015
,
China
材料科学技术（英文）
A preliminary model for the analysis of thermo-mechanical behaviour of interfacial coatings on the fibers in unidirectional composites have been developed on the solution of thermo-elastic mechan- ics. Thermal stress would be introduced into the composite during cooling because of the mismatch of thermo-mechanical properties among their components. The low modulus coating can effectively reduce the interracial stress caused by different thermal expansion coefficient between fibers and ma- trix, no matter how high or low the expansion coefficients of coatings are in CF/Al and SiC/Ti composite systems, however, high modulus coating can decrease the interfacial compressive stress, only when the thermal expansion coefficient of coating is lower.
关键词:
composite
,
null
,
null
