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首页> 外文会议>2003 International Conference on Powder Metallurgy amp; Particulate Materials; Jun 8-12, 2003; Las Vegas, NV >Spark Plasma Sintering of Iron Powder Embedded in Conductive and Non-Conductive Pressure Media
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Spark Plasma Sintering of Iron Powder Embedded in Conductive and Non-Conductive Pressure Media

机译：嵌入导电和非导电压力介质中的铁粉的火花等离子体烧结

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The Spark Plasma Sintering (SPS) process allows compaction of metallic powders at comparatively low temperature and short holding times. This process resembles the hot pressing process, but in the SPS process the sample, loaded in a graphite pressure die, is heated by allowing a pulsed direct current to pass through the die. In this article the sintering behaviour of the iron powder NC100.24 is presented. In order to avoid contamination by the carbon die the sample to be compacted can be embedded in an inert pressure media. Prior to the sintering experiments the green bodies were thus embedded in a conducting pressure medium (TiN) and in non-conducting media (coarse and fine-grained alumina). The influence of various processing parameters such as green body density, applied pressure, sintering temperature and holding time etc. on the obtained densities have been studied using both alumina and TiN as pressure media. Depending on the green body densities, pressure media used, the processing parameters applied etc, densities in the range 89-98% was obtained. Performing the experiment in coarse grained alumina and sintering at 1100℃ with a holding time of 5 min and using a pressure of 60 MPa yielded the highest final density, about 98%. High green body density yields high density in the compacted body.
机译：火花等离子烧结（SPS）工艺允许在相对较低的温度和较短的保持时间下压实金属粉末。此过程类似于热压过程，但在SPS过程中，通过允许脉冲直流电通过模具，将装入石墨压力模具中的样品加热。本文介绍了铁粉NC100.24的烧结行为。为了避免被碳模污染，可以将待压实的样品嵌入惰性压力介质中。因此，在烧结实验之前，将生坯嵌入导电压力介质（TiN）和非导电介质（粗氧化铝和细粒氧化铝）中。以氧化铝和氮化钛​​为压力介质，研究了生坯密度，施加压力，烧结温度和保温时间等各种工艺参数对所得密度的影响。取决于生坯密度，所用压力介质，所施加的加工参数等，获得的密度为89-98％。在粗粒氧化铝中进行实验，并在1100℃，5分钟的保持时间和60 MPa的压力下烧结，最终密度最高，约为98％。高的生坯密度在压实体中产生高密度。

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