Ultrasonic properties of Ni–Fe–B4C cermets produced by tube furnace sintering

Vildan Özkan Bilici
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引用次数: 1

Abstract

B4C–Fe–based cermets with various Ni concentrations were produced by tube furnace sintering using the powder metallurgy method. The prepared cermets were sintered at 1000 °C under the argon shroud. Ultrasonic properties such as ultrasonic wave velocities, ultrasonic longitudinal and shear attenuation values, Young's (elastic) modulus, and Poisson’s ratio were determined by the pulse-echo method using 2 MHz and 4 MHz probes. The obtained ultrasonic properties were used to characterize the properties of the samples. It was observed that ultrasonic wave velocities and Young's modulus decreased with increasing Ni concentration. At the same time, ultrasonic attenuation values and Poisson ratio increased with increasing Ni concentration. According to the results, the amount of Ni has an effective role in the structure of the cermets.
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管炉烧结法制备Ni-Fe-B4C陶瓷的超声性能
采用粉末冶金方法,采用管式炉烧结法制备了不同镍浓度的b4c - fe基陶瓷。制备的陶瓷在1000℃氩气罩下烧结。采用脉冲回波法,利用2 MHz和4 MHz探头,测定了超声波速、超声纵向和剪切衰减值、杨氏(弹性)模量和泊松比等超声特性。所得的超声性能用于表征样品的性能。超声波速和杨氏模量随Ni浓度的增加而减小。同时,超声衰减值和泊松比随Ni浓度的增加而增大。结果表明,Ni的含量对陶瓷的结构有有效的影响。
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