Microstructure and properties of in situ TiCP/Mn18Cr2 architecture composites

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2024-09-24 DOI:10.1016/j.ceramint.2024.09.322

Mojin Zhou , Jian Yang , Zulai Li , Yehua Jiang , Dehong Lu

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引用次数: 0

Abstract

In situ TiC ceramic particle-reinforced steel matrix composites, typically produced via liquid metal infiltration of unstructured preforms, often demonstrate issues with composite areas being prone to fracture. To address this problem, particles with an average diameter of 3 mm were constructed and used to fabricate preforms. Using the in situ self-generation method, the composites were then synthesised with liquid Mn18Cr2. To control the degree of in situ spontaneous reaction, moderator alloy powders at concentrations of 20, 30, 40 and 50 wt.% were utilised. The results reveal that the TiC particle size in the composites gradually decreases as the moderator concentration in the preform increases, reducing from 1.31 to 0.92 μm. The microhardness and elastic modulus at the composite interfaces are intermediate between those of the TiC ceramic particles and the high manganese steel matrix. The inclusion of millimetre-scale architecture enhances the tensile strength of the composites, with tensile strength gradually increasing as the moderator content decreases. This study offers a comprehensive understanding of how moderator content influences the microstructure and mechanical properties of TiC-reinforced Mn18Cr2 composites, providing valuable insights for the development of high-performance structural materials.

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原位 TiCP/Mn18Cr2 结构复合材料的微观结构和性能

原位 TiC 陶瓷颗粒增强钢基复合材料通常是通过液态金属渗入非结构化预型件生产的，经常出现复合材料区域容易断裂的问题。为解决这一问题，我们构建了平均直径为 3 毫米的颗粒，并将其用于制造预型件。使用原位自生成方法，然后用液态 Mn18Cr2 合成复合材料。为了控制原位自发反应的程度，使用了浓度为 20、30、40 和 50 wt.% 的慢化剂合金粉末。结果表明，随着预型件中慢化剂浓度的增加，复合材料中的 TiC 粒径逐渐减小，从 1.31 μm 减小到 0.92 μm。复合材料界面的微硬度和弹性模量介于 TiC 陶瓷颗粒和高锰钢基体之间。毫米级结构的加入增强了复合材料的抗拉强度，随着慢化剂含量的减少，抗拉强度逐渐增加。这项研究全面了解了慢化剂含量如何影响 TiC 增强 Mn18Cr2 复合材料的微观结构和机械性能，为开发高性能结构材料提供了宝贵的见解。

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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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.