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首页> 外文期刊>Journal of Materials Science >MICROSTRUCTURES AND ROOM TEMPERATURE MECHANICAL PROPERTIES OF NIAL PREPARED BY HIGH PRESSURE REACTION SINTERING
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MICROSTRUCTURES AND ROOM TEMPERATURE MECHANICAL PROPERTIES OF NIAL PREPARED BY HIGH PRESSURE REACTION SINTERING

机译：高压反应烧结制备的纳米晶的微观结构和室温温度力学性能。

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摘要

The microstructures and room temperature compressive mechanical properties of a near-stoichiometric NiAl manufactured by a new high pressure reaction sintering (HPRS) process are investigated. Applying a very high uniaxial pressure (2 GPa) leads to considerable lowering of the sintering temperature and reducing the hold time gives NiAl with a good sintering density. The HPRS NiAl consists of beta-NIAl with a B2 structure containing a high density of dislocations, 3.5 x 10(9) cm(-2), and very fine Al2O3 particles. The NiAl exhibits quite high true compressive strain, 14.5%, and a reasonably high yield strength, 526 MPa. The effects of employing the high pressure in the HPRS process on the reaction sintering, microstructures and mechanical properties of the NiAl are studied. [References: 44]
机译：研究了通过新型高压反应烧结（HPRS）工艺制造的接近化学计量的NiAl的微观结构和室温压缩机械性能。施加非常高的单轴压力（2 GPa）会大大降低烧结温度，并减少保持时间，从而使NiAl具有良好的烧结密度。 HPRS NiAl由具有B2结构的β-NIAl组成，该B2结构包含高位错密度，3.5 x 10（9）cm（-2）和非常细的Al2O3颗粒。 NiAl表现出相当高的真实压缩应变（14.5％）和相当高的屈服强度（526 MPa）。研究了在HPRS工艺中采用高压对NiAl的反应烧结，显微组织和力学性能的影响。 [参考：44]

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