通过分散ZrO2颗粒作为热稳定剂在注射成型17-4PH不锈钢的超高温烧结过程中抑制生长

IF 1.9 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Powder Metallurgy Pub Date : 2022-05-31 DOI:10.1080/00325899.2022.2069076

Masoud Moradjoy, H. Khorsand

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引用次数: 0

摘要

本文研究了17-4PH粉末的金属注射成型和超高温烧结。有目的地，通过在原料制备过程中施加高剪切应力来分散5质量%的ZrO2颗粒。在超高烧结温度下，均匀分布的颗粒有效地阻碍了粉末边界的迁移并限制了它们的生长。所获得的热稳定性为将最终孔隙率降低至3%提供了合适的条件，并显著提高了极限强度至1070 在1380°C下烧结后的MPa。此外，ZrO2颗粒起到促进固体粉末之间滑动的作用，并显著降低了注射所需的压力至700巴。通过在ZrO2颗粒粉末注射成型领域引入这种新方法，各向异性收缩量减少到2%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Growth inhibiting during ultra-high temperature sintering of injection moulded 17-4 PH stainless steel through the dispersion of ZrO2 particle as a thermal stabiliser

ABSTRACT The present work deals with the metal injection moulding and ultra-high temperature sintering of 17-4 PH powder. Purposefully, 5 mass% ZrO2 particles were dispersed by applying high shear stress during feedstock preparation. Uniformly distributed particles effectively hindered the powder boundary migration and limited their growth during ultra-high sintering temperatures. The achieved thermal stability provided a proper condition for reducing the final porosity to 3% and significantly improved the ultimate strength to 1070 MPa after sintering at 1380°C. Also, the ZrO2 particles acted as facilitators of sliding between solid powders and substantially reduced the required pressure for injecting to 700 Bar. Through introducing such a new approach in the field of powder injection moulding by ZrO2 particles, the amount of anisotropic shrinkage was reduced to 2%.

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来源期刊

Powder Metallurgy 工程技术-冶金工程

CiteScore

2.90

自引率

7.10%

发文量

审稿时长

3 months

期刊介绍： Powder Metallurgy is an international journal publishing peer-reviewed original research on the science and practice of powder metallurgy and particulate technology. Coverage includes metallic particulate materials, PM tool materials, hard materials, composites, and novel powder based materials.