Mg-Ti composites fabricated by a novel one-step high-pressure sintering: The correlation between microstructures and mechanical properties

In this paper, nanocrystalline diamond with the average grain size of 50nm was prepared under different sintering pressure, temperature and sintering time. The microstructure of the sample was analyzed by SEM, EDS and XRD, and the mechanical properties tested by micro-hardness tester and wear ratio instrument. The results show that the sample sintered under the optimum conditions of oil pressure 87MPa, heating power 4000W and sintering time 120s possessed hardness of 706.41HV and wear ratio of 3280. It indicated that high performance n-PCD sintered from nanodiamond and silicon system can be formed hardly with diamond to diamond bonding but can be formed with diamond to silicon carbide bonding. The poor mechanical properties of the samples were due to the surface adsorption groups and surface graphitization of nanodiamond during high pressure sintering.

Download Full-text

Microstructures and mechanical properties of pure tantalum processed by high-pressure torsion

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/63/1/012100 ◽

2014 ◽

Vol 63 ◽

pp. 012100 ◽

Cited By ~ 5

Author(s):

Y Huang ◽

N Maury ◽

N X Zhang ◽

T G Langdon

Keyword(s):

Mechanical Properties ◽

High Pressure ◽

High Pressure Torsion ◽

Microstructures And Mechanical Properties ◽

Pure Tantalum

Download Full-text

Microstructures and Mechanical Properties of Pure V and Mo Processed by High-Pressure Torsion

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.m2009375 ◽

2010 ◽

Vol 51 (6) ◽

pp. 1072-1079 ◽

Cited By ~ 35

Author(s):

Seungwon Lee ◽

Kaveh Edalati ◽

Zenji Horita

Keyword(s):

Mechanical Properties ◽

High Pressure ◽

High Pressure Torsion ◽

Microstructures And Mechanical Properties

Download Full-text

Microstructures and Mechanical Properties of Mg-1at%X Alloys Processed with High-Pressure Torsion

Magnesium Technology 2015 ◽

10.1007/978-3-319-48185-2_43 ◽

2015 ◽

pp. 231-236

Author(s):

Hiroyuki Kawabata ◽

Shigeru Kuramoto ◽

Keiichiro Oh-ishi

Keyword(s):

Mechanical Properties ◽

High Pressure ◽

High Pressure Torsion ◽

Microstructures And Mechanical Properties

Download Full-text

Microstructure and Properties of AA6061/SiCp Composites Sintered under Ultra High-Pressure

Applied Sciences ◽

10.3390/app10207363 ◽

2020 ◽

Vol 10 (20) ◽

pp. 7363

Author(s):

Lei Xu ◽

Erkuo Yang ◽

Yasong Wang ◽

Changyun Li ◽

Zhiru Chen ◽

...

Keyword(s):

Mechanical Properties ◽

High Pressure ◽

Wear Resistance ◽

Wear Rate ◽

Abrasive Wear ◽

Wear Mechanism ◽

Adhesive Wear ◽

Wear Property ◽

Ultra High Pressure ◽

High Pressure Sintering

Ultra high-pressure sintering (UHPS) was used to prepare AA6061/SiCp composites with different contents and the effect of sintering temperatures on microstructure and mechanical properties was investigated in this study. The results showed that a uniform distribution of nano-SiC particles (N-SiCp) is obtained by the UHPS method. With the increase in N-SiCp contents, the higher hardness and better wear resistance could be inspected. The interfacial reactions and Al4C3 phase appeared above 550 °C. The relative density of composites first increased and then decreased; with the temperature raising it reached 99.58% at 600 °C. The hardness and wear property showed the same trend with the hardness reaching 52 HRA and wear rate being 1.0 × 10−6 g/m at 600 °C. Besides, the wear mechanism of the composites is mainly composed of abrasive wear and adhesive wear.

Download Full-text