Effects of particle size and additives on phase transformation of cubic BN during the spark plasma sintering

IF 3.8 3区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of the American Ceramic Society Pub Date : 2025-09-01 DOI:10.1111/jace.70196

Jiao Li, Yiquan Wu

引用次数: 0

Abstract

Cubic boron nitride (cBN) powders with different particle sizes ranging from 250 nm to 6 µm were sintered at temperatures between 800°C and 1450°C under a pressure of 100 MPa using spark plasma sintering (SPS). Elevated sintering temperatures promoted phase transformation from cubic to hexagonal BN phase. It is found that the activation energy for phase transition increased dramatically with cBN particle sizes, ranging from 43 to 739 kJ •mol⁻¹. Additionally, the addition of various oxide additives (Al₂O₃, Y₂O₃, ZrO₂, SiO₂, and MgO) induced distinct effects on cBN phase transformation during the SPS process. Among these, SiO₂ was observed to retard the transformation due to the separating effect of amorphous SiO₂, whereas other additives accelerated the transformation by reducing the activation energy of cBN.

Abstract Image

查看原文本刊更多论文

晶粒尺寸和添加剂对放电等离子烧结过程中立方氮化硼相变的影响

采用火花等离子烧结（SPS）技术，在800℃~ 1450℃的温度下，在100 MPa的压力下，烧结了250 nm ~ 6µm的立方氮化硼（cBN）粉末。升高的烧结温度促进了立方BN相向六方BN相转变。结果表明，随着cBN粒径的增大，相变活化能显著增大，为43 ~ 739 kJ•mol−1。此外，不同氧化物添加剂（Al2O3、Y2O3、ZrO2、SiO2和MgO）的加入对SPS过程中cBN相变有不同的影响。其中，SiO2由于无定形SiO2的分离作用而延缓了相变，而其他添加剂通过降低cBN的活化能加速了相变。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of the American Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

7.50

自引率

7.70%

发文量

590

审稿时长

2.1 months

期刊介绍： The Journal of the American Ceramic Society contains records of original research that provide insight into or describe the science of ceramic and glass materials and composites based on ceramics and glasses. These papers include reports on discovery, characterization, and analysis of new inorganic, non-metallic materials; synthesis methods; phase relationships; processing approaches; microstructure-property relationships; and functionalities. Of great interest are works that support understanding founded on fundamental principles using experimental, theoretical, or computational methods or combinations of those approaches. All the published papers must be of enduring value and relevant to the science of ceramics and glasses or composites based on those materials. Papers on fundamental ceramic and glass science are welcome including those in the following areas: Enabling materials for grand challenges[...] Materials design, selection, synthesis and processing methods[...] Characterization of compositions, structures, defects, and properties along with new methods [...] Mechanisms, Theory, Modeling, and Simulation[...] JACerS accepts submissions of full-length Articles reporting original research, in-depth Feature Articles, Reviews of the state-of-the-art with compelling analysis, and Rapid Communications which are short papers with sufficient novelty or impact to justify swift publication.