Effect of Ni content on microstructures and mechanical properties of hot-pressed TiC–TiB2–Ni composite

Yue, Xinyan; Cai, Zhixin; Lü, Xiaohui; Wang, Jianjun; Ru, Hongqiang

doi:10.1016/j.msea.2016.05.053

Cited by 35 publications

(7 citation statements)

References 29 publications

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“…Many kinds of technologies have been adopted to solve the problem of being lightweight, having a high level of strength and high ductility of ceramic/Al composites, such as matrix modification [ 10 , 11 ], interfaces modification [ 12 ] and improvement of the fabrication method [ 1 , 13 , 14 ]. A second metal was used to add into material systems, which formed an intermetallic compound of Al-Metal.…”

Section: Introductionmentioning

confidence: 99%

Study on the Mechanical Properties of Bionic Coupling Layered B4C/5083Al Composite Materials

et al. 2018

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Based on microstructure characteristics of Meretrix lusoria shell and Rapana venosa shell, bionic coupling layered B4C/5083Al composites with different layered structures and hard/soft combination models were fabricated via hot pressed sintering. The simplified bionic coupling models with hard and soft layers were similar to layered structure and hardness tendency of shells, guiding the bionic design and fabrication. B4C/5083Al composites with various B4C contents and pure 5083Al were treated as hard and soft layers, respectively. Hot pressed sintering maintained the designed bionic structure and enhanced high bonding strength between ceramics and matrix. Compared with B4C/5083Al composites, bionic layered composites exhibited high mechanical properties including flexural strength, fracture toughness, compressive strength and impact toughness. The hard layers absorbed applied loads in the form of intergranular fracture. Besides connection role, soft layers restrained slabbing phenomenon and reset extension direction of cracks among layers. The coupling functions of bionic composites proved the feasibility and practicability of bionic fabrication, providing a new method for improvement of ceramic/Al composite with properties of being lightweight and high mechanical strength.

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Section: Introductionmentioning

confidence: 99%

Study on the Mechanical Properties of Bionic Coupling Layered B4C/5083Al Composite Materials

et al. 2018

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“…Monteverde et al pointed out that Ni can lower sintering temperature and promote densification of ZrB 2 –TiB 2 and ZrB 2 –B 4 C ceramics during hot-pressed sintering [ 28 ]. Moreover, many studies show that the content of metal sintering aids is generally in the range of 4~10 wt % in the liquid phase sintering process of ceramics; too little metal content cannot promote the complete liquid phase sintering of ceramics; excessive metal content will lower the hardness of ceramics [ 29 , 30 , 31 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of ZrB2–HfC Ceramics Influenced by HfC Addition

2018

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ZrB2–HfC ceramics have been fabricated using the liquid phase sintering technique at a sintering temperature as low as 1750 °C through the addition of Ni. The effects of HfC addition on the microstructure and mechanical properties of ZrB2–based ceramics have been investigated. These ceramics were composed of ZrB2, HfC, Ni, and a small amount of possible (Zr, Hf)B2 solid solution. Small HfC grains were distributed among ZrB2 grain boundaries. These small grains could improve the density of ZrB2–based ceramics and play a pinning role. With HfC content increasing from 10 wt % to 30 wt %, more HfC grains were distributed among ZrB2 grain boundaries, leading to weaker interface bonding among HfC grains; the relative density and Vickers hardness increased, and flexural strength and fracture toughness decreased. The weak interface bonding for 20 and 30 wt % HfC contents was the main cause of the decrease in both flexural strength and fracture toughness.

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“…Generally, metal or alloy binders are introduced to improve the sinterability and fracture toughness of ceramics due to the deformation of plastics and crack bridging. Yue [ 7 ] fabricated TiC–TiB 2 -8 wt % Ni composite with hardness of 18.8 GPa and fracture toughness of 8.9 MPa·m 1/2 . Acharya [ 8 ] sintered TiC-10 wt % Ni–10 wt % NiB composite with hardness of 2759 HV and fracture toughness of 8.98 MPa·m 1/2 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Non-Stoichiometric (TiNb)C0.5 with High Hardness and Fracture Toughness under HTHP

Zhang

Tang

et al. 2018

Materials

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Nonstoichiometric TiC0.5 and (TiNb)0.5 powders were prepared by the mechanical alloying process using Ti, Nb, and TiC powders as raw materials. Furthermore, the as-prepared TiC0.5 and (TiNb)0.5 powders were used as initial materials to fabricate TiC0.5 and (TiNb)0.5 compacts under high pressures and high temperatures (HTHP) of 5.5 GPa and 1200–1550 °C for 5 min. Phase identification and microstructure of the mechanical-alloyed powders and the sintered TiC0.5 and (TiNb)0.5 compacts were realized by an X-ray diffractometer and scanning electron microscope. The results indicate that the as-prepared TiC0.5 and (TiNb)0.5 powders have a similar crystal structure of face-centered cubic (FCC) to TiC. The sintered (TiNb)0.5 compact has good Vickers hardness (~16 GPa), and notably, excellent fracture toughness (~7.3 MPa·m1/2). The non-stoichiometric compound not only reduced the sintering temperature of covalent compounds, but also greatly enhanced the mechanical properties of the materials. Thus, we have provided a novel synthetic strategy for the production of a compound with high-strength covalent bonds.

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Effect of Ni content on microstructures and mechanical properties of hot-pressed TiC–TiB2–Ni composite

Cited by 35 publications

References 29 publications

Study on the Mechanical Properties of Bionic Coupling Layered B4C/5083Al Composite Materials

Study on the Mechanical Properties of Bionic Coupling Layered B4C/5083Al Composite Materials

Microstructure and Mechanical Properties of ZrB2–HfC Ceramics Influenced by HfC Addition

Synthesis of Non-Stoichiometric (TiNb)C0.5 with High Hardness and Fracture Toughness under HTHP

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