Microstructural evolution and electrochemical properties of the ultra-high pressure treated La0.70Mg0.30Ni3.3 hydrogen storage alloy

Wu, Cong; Yang, Shuqin; Li, Yuan; Ma, Yufei; Zhang, Lu; Liu, Jingjing; Han, Shumin

doi:10.1016/j.jallcom.2016.01.039

Cited by 12 publications

(1 citation statement)

References 38 publications

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“…Ultra-high pressure (UHP) sintering is another fast-sintering technique similar to SPS that can heat and cool rapidly [ 23 , 24 , 25 ]. The powder particles can be in close contact under ultra-high pressure, which is beneficial to the densification of the sintered sample, lowering the sintering temperature and shortening the sintering time.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ultra-High Pressure Sintering and Spark Plasma Sintering and Subsequent Heat Treatment on the Properties of Si3N4 Ceramics

Huang

et al. 2022

Materials

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In this study, coarse Beta silicon nitride (β-Si3N4) powder was used as the raw material to fabricate dense Si3N4 ceramics using two different methods of ultra-high pressure sintering and spark plasma sintering at 1550 °C, followed by heat treatment at 1750 °C. The densification, microstructure, mechanical properties, and thermal conductivity of samples were investigated comparatively. The results indicate that spark plasma sintering can fabricate dense Si3N4 ceramics with a relative density of 99.2% in a shorter time and promote α-to-β phase transition. Coarse β-Si3N4 grains were partially fragmented during ultra-high pressure sintering under high pressure of 5 GPa, thereby reducing the number of the nucleus, which is conducive to the growth of elongated grains. The UHP sample with no fine α-Si3N4 powder addition achieved the highest fracture strength (822 MPa) and fracture toughness (6.6 MPa·m1/2). The addition of partial fine α-Si3N4 powder facilitated the densification of the SPS samples and promoted the growth of elongated grains. The β-Si3N4 ceramics SPS sintered with fine α-Si3N4 powder addition obtained the best comprehensive performance, including the highest density of 99.8%, hardness of 1890 HV, fracture strength of 817 MPa, fracture toughness of 6.2 MPa·m1/2, and thermal conductivity of 71 W·m−1·K−1.

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Section: Introductionmentioning

confidence: 99%

Effect of Ultra-High Pressure Sintering and Spark Plasma Sintering and Subsequent Heat Treatment on the Properties of Si3N4 Ceramics

Huang

et al. 2022

Materials

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A study on recrystallization behavior and recrystallization texture of high pressure heat-treated Al–Mg alloy

Sun

Kong

et al. 2023

J Mater Sci

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A high-performance Sn–Sb–Cu alloy processed by pressure heat treatment: microstructure, thermal and mechanical properties

El-Taher

2023

J Mater Sci: Mater Electron

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Microstructural evolution and electrochemical properties of the ultra-high pressure treated La0.70Mg0.30Ni3.3 hydrogen storage alloy

Cited by 12 publications

References 38 publications

Effect of Ultra-High Pressure Sintering and Spark Plasma Sintering and Subsequent Heat Treatment on the Properties of Si3N4 Ceramics

Effect of Ultra-High Pressure Sintering and Spark Plasma Sintering and Subsequent Heat Treatment on the Properties of Si3N4 Ceramics

A study on recrystallization behavior and recrystallization texture of high pressure heat-treated Al–Mg alloy

A high-performance Sn–Sb–Cu alloy processed by pressure heat treatment: microstructure, thermal and mechanical properties

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