Design, Fabrication and Properties of Periodic Ordered Structural Composites with TiB-Ti Units

doi:10.15541/jim20230557

Abstract

Abstract:

High-performance structural material components are widely researched because of their curcial applications in aerospace, transportation and automotive, electronic information, metallurgy, and other fields. Traditional methods for enhancing the overall performance of structural material components mainly include improving intrinsic material properties and optimizing structural composite design. However, research on enhancing the intrinsic mechanical properties of single structural materials is reaching its limits. This study aims to explore a new paradigm for the development of high-performance structural composites by proposing the concept of periodic ordered structural materials and preparing the structural composites with improved overall properties through integrated sintering. The TiB-Ti functional unit with high hardness of ceramics and strong toughness of metal was structured through periodical sequencing, and high-performance TiB-Ti structural composites with different periodical sequencing modes were designed and prepared. On this basis, the mechanical properties of these structures were investigated, and their fracture modes were analyzed to understand how different ordering modes affect the overall properties of the materials. The results show that periodic ordered structure can improve the overall performance of materials by altering their macroscopic fracture modes and stress distribution properties. This new paradigm of research provides valuable insights and guidance for the structural design and performance breakthrough of other structural composites. Future research may focus on the exploration of the complexity of the periodic ordered structure modes, identifying potential application scenarios for these materials, and conducting additional performance testing studies.

Key words: composite material, periodic order, mechanical property, structural design

CLC Number:

TB333

SUN Haiyang, JI Wei, WANG Weimin, FU Zhengyi. Design, Fabrication and Properties of Periodic Ordered Structural Composites with TiB-Ti Units[J]. Journal of Inorganic Materials, 2024, 39(6): 662-670.

Figures/Tables 12

Fig. 1 Morphologies and phase compositions of raw materials (a, b) Microstructures of (a) Ti powder and (b) TiB2powder; (c) XRD patterns of Ti and TiB2powders

Fig. 2 Structure diagrams of periodic ordered structural composites with TiB-Ti units

Fig. 3 XRD patterns of periodic ordered structure composites

Fig. 4 Fractural microstructures of TiB-Ti composites prepared by SPS (a) TiB fracture surface; (b) Ti fracture surface; (c) Two-phase interface fracture

Fig. 5 Distribution of elements on ababab section of TiB-Ti periodic ordered composite tested by EPMA (a) Sample selection photo; (b) Ti element distribution; (c) B element distribution; (d) Backscattered electron (BSE) image

Fig. 6 EDS mappings of the TiB-Ti composite materials interface (a)SEM image; (b) Ti element; (c) B element

Table1 Mechanical properties of TiB ceramic and Ti metal materials

Parameter	TiB	Ti
Density/(g·cm^-3)	4.56	4.50
E/GPa	370	110
K_IC/(MPa·m^1/2)	6.1	29.3
Bending strength/MPa	489.95	238.32
Compressive strength/MPa	1035.43	1596.26
Hardness/GPa	20.0	1.7

Fig. 7 Mechanical properties of six TiB-Ti periodic ordered composites (a) Bending strength stress-strain curves; (b) Bending strength line chart; (c) Compressive strength stress-strain curves; (d) Compressive strength line chart; Colorful figures are available on website

Fig. 8 Macro-cracked morphologies (a-f) and fracture appearances (a'-f') of six TiB-Ti periodic ordered composite bending samples and compressed samples (a, a') aaabbb; (b, b') aabbab; (c, c') aababb; (d, d') abbaab; (e, e') abaabb; (f, f') ababab

Fig. 9 Macro fracture morphologies of six TiB-Ti periodic ordered composite bending samples (a) aaabbb; (b) aabbab; (c) aababb; (d) abbaab; (e) abaabb; (f) ababab

Fig. 10 Macro fracture morphology of TiB-Ti periodic ordered composite sample with compressed ababab structure

Fig. 11 Microscopic fracture morphologies of TiB-Ti periodic ordered composite bending samples (a, b) and compressed samples (c, d) (a, c) TiB layer; (b, d) Ti layer

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