Room Temperature Elastic Moduli and Vickers Hardness of Hot-Pressed LLZO Cubic Garnet

Ni, Jennifer E.; Case, Eldon D.; Sakamoto, Jeffrey S.; Rangasamy, Ezhiyl; Wolfenstine, Jeffrey B.

Room Temperature Elastic Moduli and Vickers Hardness of Hot-Pressed LLZO Cubic Garnet

Active / Technical Report | Accession Number: ADA577816 |

Abstract:

Cubic garnet Li6.24La3Zr2Al0.24O11.98 LLZO is a candidate material for use as an electrolyte in Li-Air and Li-S batteries. The use of LLZO in practical devices will require LLZO to have good mechanical integrity in terms of scratch resistance hardness and an adequate stiffness elastic modulus. In this paper, the powders were fabricated by powder processing of cast ingots. All specimens were then densified via hot pressing. The room temperature elastic moduli Youngs modulus, shear modulus, bulk modulus, and Poissons ratio and hardness were measured by resonant ultrasound spectroscopy, and Vickers indentation, respectively. For volume fraction porosity, P, the Youngs modulus was 149.8 0.4 GPa P 0.03 and 132.6 0.2 GPa P 0.06. The mean Vickers hardness was 6.3 0.3 GPa for P 0.03 and 5.2 0.4 for P 0.06.

Author(s):

Ni, Jennifer E. ; Case, Eldon D. ; Sakamoto, Jeffrey S. ; Rangasamy, Ezhiyl ; Wolfenstine, Jeffrey B.

Author Organization(s):

MICHIGAN STATE UNIV EAST LANSING

Descriptive Note:

Journal article

Supplementary Note:

Pub. in Journal of Materials Science, v47 n23, p7978-7985, 2012.

Pagination:

0011

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:

Approved For Public Release

Distribution Statement:

Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR

Identifying Numbers

Report Number(s):

ARO-57230-CH.20

Contract/Grant Number(s):

W911NF-09-1-0451

Monitor Series:

57230-CH.20, ARO

Subject Terms

Joint Capability Areas:

JCA_7.2.1_Mitigate Lethal Effects; JCA_7.2_Mitigate; JCA_7_Protection; JCA_5_Command and Control; JCA_1_Force Support; JCA_6_Net Centric; JCA_8_Building Partnerships

Communities of Interest:

Energy and Power Technologies

Descriptor(s):

*HARDNESS, *HOT PRESSING, BULK MODULUS, ELECTROLYTES, GARNET, MECHANICAL PROPERTIES, MODULUS OF ELASTICITY, POISSON RATIO, POROSITY, RESONANCE, ROOM TEMPERATURE, SHEAR MODULUS, SPECTROSCOPY, STIFFNESS, ULTRASONICS

Field(s)/Group(s):

Properties of Metals and Alloys, Manufacturing and Industrial Engineering and Control of Production Systems

Keyword(s):

ELASTIC MODULI, VICKERS HARDNESS, PE611102

Report Date:

2011 Jan 01

Creation Date:

2013 Jun 17