Dataset Information

The relation between residual stress, interfacial structure and the joint property in the SiO_2f/SiO₂-Nb joints.

ABSTRACT: In order to achieve a high-quality joint between SiO_2f/SiO₂ and metals, it is necessary to address the poor wettability of SiO_2f/SiO₂ and the high residual stress in SiO_2f/SiO₂-Nb joint. Here, we simultaneously realize good wettability and low residual stress in SiO_2f/SiO₂-Nb joint by combined method of HF etching treatment and Finite Element Analysis (FEA). After etching treatment, the wettability of E-SiO_2f/SiO₂ was improved, and the residual stress in the joint was decreased. In order to better control the quality of joints, efforts were made to understand the relationship between surface structure of E-SiO_2f/SiO₂ and residual stress in joint using FEA. Based on the direction of FEA results, a relationship between residual stress, surface structure and joint property in the brazed joints were investigated by experiments. As well the FEA and the brazing test results both realized the high-quality joint of E-SiO_2f/SiO₂-Nb and the shear strength of the joint reached 61.9 MPa.

SUBMITTER: Ma Q

PROVIDER: S-EPMC5482827 | biostudies-literature | 2017 Jun

REPOSITORIES: biostudies-literature

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The relation between residual stress, interfacial structure and the joint property in the SiO2f/SiO2-Nb joints.

Ma Qiang Q Li Zhuo Ran ZR Yang Lai Shan LS Lin Jing Huang JH Ba Jin J Wang Ze Yu ZY Qi Jun Lei JL Feng Ji Cai JC

Scientific reports 20170623 1

In order to achieve a high-quality joint between SiO2f/SiO2 and metals, it is necessary to address the poor wettability of SiO2f/SiO2 and the high residual stress in SiO2f/SiO2-Nb joint. Here, we simultaneously realize good wettability and low residual stress in SiO2f/SiO2-Nb joint by combined method of HF etching treatment and Finite Element Analysis (FEA). After etching treatment, the wettability of E-SiO<s ...[more]

PMID: 28646185

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Project description:BackgroundThe relationship between physical joint examination (PE) and MRI-detected inflammation in early inflammatory arthritis has mostly been studied in the hands. Physical examination of MTP joints is considered difficult, and for these joints, this relationship is unknown. Therefore, we studied the concordance of PE with MRI inflammation in MTP joints. Metacarpophalangeal (MCP) joints were included for comparison.MethodsOne thousand seven hundred fifty-nine MTP(2-5) and 1750 MCP(2-5) joints of 441 consecutive patients with early arthritis underwent PE (for joint swelling) and MRI, all evaluated by two assessors. MRI was scored for synovitis, tenosynovitis, and osteitis (summed MRI inflammation). Synovial intermetatarsal bursae may enlarge upon inflammation and become palpable and were therefore also assessed. Analyses (frequencies, GEE) were performed on joint level.ResultsPE and MRI were concordant in 79% of MTP joints. Of 1606 non-swollen MTP joints, 83% showed no MRI inflammation and 17% showed subclinical MRI inflammation. Of 153 swollen MTP joints, 48% had MRI inflammation and 52% (79 MTP joints) did not. Of these 79 swollen MTP joints without MRI inflammation, 31 showed intermetatarsal bursitis and 48 joints had none of these MRI abnormalities (this concerned 31% of swollen MTP joints). MTP swelling was statistically independently associated with tenosynovitis (OR 2.21, 95% CI 1.1-4.3) and intermetatarsal bursitis (OR 2.91, 95% CI 1.8-4.8). MTP joints showed subclinical inflammation less often than MCP joints (17% vs. 34%, P < 0.001). Swollen MTP joints showed MRI inflammation less often than swollen MCP joints (48% vs. 88%, P < 0.001).ConclusionsThe absence of swelling of MTP joints in early arthritis is mostly accompanied by the absence of MRI-detected inflammation. Swollen MTP joints are, in addition to synovitis, also explained by tenosynovitis and intermetatarsal bursitis and partly unexplained by MRI. Their clinical relevance must be determined in longitudinal studies.

Dataset Information

The relation between residual stress, interfacial structure and the joint property in the SiO_2f/SiO₂-Nb joints.

Publications

The relation between residual stress, interfacial structure and the joint property in the SiO<sub>2f</sub>/SiO<sub>2</sub>-Nb joints.

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