MECHANICAL-PROPERTIES OF NANOCOMPOSITE GRANULAR METAL THIN-FILMS

被引：14

作者：

SCANLON, MR ^{[1
]}

CAMMARATA, RC ^{[1
]}

机构：

[1] JOHNS HOPKINS UNIV, DEPT MAT SCI & ENGN, BALTIMORE, MD 21218 USA

来源：

JOURNAL OF APPLIED PHYSICS | 1994年 / 76卷 / 06期

关键词：

D O I：

10.1063/1.357465

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The mechanical properties of nanocomposite Ag-Al2O3 and Fe-SiO2 granular metal films were investigated by low-load indentation and laser ultrasonic methods. A discontinuity in the rate of change of hardness as a function of metal volume fraction was observed near the percolation threshold for the metal. However, the sign of the rate of change was different for the two systems. It is suggested that this discontinuity was the result of a change in deformation mechanism as the percolation threshold for the softer phase was crossed. The elastic moduli of the Ag-Al2O3 films as measured by a laser ultrasonic technique displayed a rule-of-mixtures-type behavior, in contrast to nanoindentation measurements that gave a peak in the apparent compliance. Indentation crack testing indicated that the toughness increased in the Ag-Al2O3 system when the metallic phase was introduced into the ceramic, but that the Fe-SiO2 system displayed unexpected and novel fracture behavior.

引用

页码：3387 / 3393

页数：7

共 22 条

[1]

ABELES B, 1975, ADV PHYS, V24, P407, DOI 10.1080/00018737500101431

[2]

ABELES B, 1976, APPLIED SOLID STATE, V1

[3]

BANSAL NP, 1986, HDB GLASS PROPERTIES, P337

[4] PARTICLE REINFORCEMENT OF DUCTILE MATRICES AGAINST PLASTIC-FLOW AND CREEP [J].

BAO, G ;

HUTCHINSON, JW ;

MCMEEKING, RM .

ACTA METALLURGICA ET MATERIALIA, 1991, 39 (08) :1871-1882

[5] INTERPRETATION OF LASER-GENERATED LOW-ORDER LAMB WAVES FOR ELASTIC-MODULUS MEASUREMENTS IN THIN-FILMS [J].

BOBBIN, SE ;

WAGNER, JW ;

CAMMARATA, RC .

ULTRASONICS, 1992, 30 (02) :87-90

[6] DETERMINATION OF THE FLEXURAL MODULUS OF THIN-FILMS FROM MEASUREMENT OF THE 1ST ARRIVAL OF THE SYMMETRICAL LAMB WAVE [J].

BOBBIN, SE ;

WAGNER, JW ;

CAMMARATA, RC .

APPLIED PHYSICS LETTERS, 1991, 59 (13) :1544-1546

[7]

BOYER HE, 1987, HARDNESS TESTING, P13602

[8] MECHANICAL-PROPERTIES OF NANOCOMPOSITE THIN-FILMS [J].

CAMMARATA, RC .

THIN SOLID FILMS, 1994, 240 (1-2) :82-87

[9] EFFECTS OF SURFACE STRESS ON THE ELASTIC-MODULI OF THIN-FILMS AND SUPERLATTICES [J].

CAMMARATA, RC ;

SIERADZKI, K .

PHYSICAL REVIEW LETTERS, 1989, 62 (17) :2005-2008

[10]

CHIEN CL, 1990, RECENT ADV MAGNETISM, P296

← 1 2 3 →