Microstructure and Properties of Ni-rGO Reinforced Sn2.5Ag0.7Cu0.1RE Composite Soldering Joints
Journal Title: 河南科技大学学报（自然科学版） - Year 2019, Vol 40, Issue 2
Abstract
Nickel particle-decorated reduced graphene oxide ( Ni-r GO) reinforced Sn2. 5 Ag0. 7 Cu0. 1 RE composite solder was prepared via powder melting process. The microstructure and properties of Ni-r GO reinforced Sn2. 5 Ag0. 7 Cu0. 1 RE composite soldering joints were investigated by scanning electron microscope ( SEM) and X ray diffraction ( XRD) . The results show that the good soldering joints are obtained between Nir GO reinforced Sn2. 5 Ag0. 7 Cu0. 1 RE composite solder and Cu substrate. With 270 ℃ soldering temperature and 240 s soldering time, the maximum shear strength with 0. 05% Ni-r GO reaches to 29. 7 MPa, which is higher than that of Sn3. 0 Ag0. 5 Cu soldering joints. With the increase of soldering time, the fracture pattern transformes from ductile fracture dominated by dimples to ductile-brittle mixed fracture composed of dimples and cleavage. Besides, the fracture pathway moves from the transition zone which consisted of soldering seam and interfacial IMC to the interfacial IMC direction. The soldering seam is composed of β-Sn and eutectic structure, while the interfacial IMC layer consists of Cu6 Sn5 and new phase ( Cu, Ni) 6 Sn5. The thickness and roughness of interfacial IMC of Ni-r GO reinforced Sn2. 5 Ag0. 7 Cu0. 1 RE composite soldering joints are increased, and the microstructure of IMC transforms from scallops to sawtooth.
Authors and Affiliations
Fupeng HUO, Keke ZHANG, Meng ZHANG, Huigai WANG
Keywords
Related Articles
- EP ID EP422465
- DOI 10.15926/j.cnki.issn1672-6871.2019.02.002
- Views 121
- Downloads 0
Structural and Electronic Properties of Bimetallic AgnPd-(n =1 ~5) Cluster
The structure and electronic properties of bimetallic AgnPd-(n =1 ~ 5) cluster anions were investigated by density functional method( PW91PW91) with LANL2 DZ basis set. The results show that the doping of Pd atoms can en...
Research on Paired Approach Procedure to Closed Spaced Parallel Runways and its Collision Risk
The paired operation mode to closed spaced parallel runways were introduced to improve the running efficiency of the runway. The process of the two aircraft from the final approach to the entry point of the runway was sh...
Method of Determining Design Time Based on Similarity Degree of Products
To solve the problems that product design time was difficult to be forecasted accurately and traditional estimation methods had large error, a design time estimation method was proposed based on similarity degree of prod...
Photoinduced Enhancement of Dielectric Constant in Rutile TiO2
The effects of ultra violet ( UV) light irradiation on the dielectric properties of rutile TiO2 and anatase TiO2 were investigated. In the dark and under UV light irradiation, the dielectric constants of rutile TiO2 and...
Effect of Arc on Tribological Characteristics of C/C Composites Under Electric Current
The friction and wear tests were carried out on an HST-100 high-speed friction and wear testing machine with a pin-on-disc configuration,and the arc images were recorded by a high-speed camera. The effect of arc on the t...