Abstract
Microhardness studies are made on single crystal of Bi2CaSr2Cu2O8+σ (BISCCO) and polycrystalline pellets of BISCCO containing different concentrations of impurity lead (Pb). Optical photomicrographs of single crystals and pellets are taken. The cleavage steps confirm the single crystalline nature of crystals whereas those of pellets show that they contain pores. XRD results confirm that the major phase is (2122). The load vs. hardness data show that the hardness has higher value at lower loads and decreases with increase in load upto 0.04 kg and remains almost the same thereafter. Increase in concentration of Pb also decreases the value of hardness. Temperature measurements indicate that the hardness decreases with increase in temperature (77 to 300 K) with no abnormality near the transition temperature. The results are explained in terms of intrinsic bond strength.
| Original language | English |
|---|---|
| Pages (from-to) | 115-120 |
| Number of pages | 6 |
| Journal | Physica Status Solidi (A) Applied Research |
| Volume | 126 |
| Issue number | 1 |
| Publication status | Published - 1991 Jul |
| Externally published | Yes |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Microhardness studies on BiCaSrCuO (2122) superconducting single crystals and pellets. / Miryala, Muralidhar; Reddy, K. Narasimha; Babu, V. Hari.
In: Physica Status Solidi (A) Applied Research, Vol. 126, No. 1, 07.1991, p. 115-120.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Microhardness studies on BiCaSrCuO (2122) superconducting single crystals and pellets
AU - Miryala, Muralidhar
AU - Reddy, K. Narasimha
AU - Babu, V. Hari
PY - 1991/7
Y1 - 1991/7
N2 - Microhardness studies are made on single crystal of Bi2CaSr2Cu2O8+σ (BISCCO) and polycrystalline pellets of BISCCO containing different concentrations of impurity lead (Pb). Optical photomicrographs of single crystals and pellets are taken. The cleavage steps confirm the single crystalline nature of crystals whereas those of pellets show that they contain pores. XRD results confirm that the major phase is (2122). The load vs. hardness data show that the hardness has higher value at lower loads and decreases with increase in load upto 0.04 kg and remains almost the same thereafter. Increase in concentration of Pb also decreases the value of hardness. Temperature measurements indicate that the hardness decreases with increase in temperature (77 to 300 K) with no abnormality near the transition temperature. The results are explained in terms of intrinsic bond strength.
AB - Microhardness studies are made on single crystal of Bi2CaSr2Cu2O8+σ (BISCCO) and polycrystalline pellets of BISCCO containing different concentrations of impurity lead (Pb). Optical photomicrographs of single crystals and pellets are taken. The cleavage steps confirm the single crystalline nature of crystals whereas those of pellets show that they contain pores. XRD results confirm that the major phase is (2122). The load vs. hardness data show that the hardness has higher value at lower loads and decreases with increase in load upto 0.04 kg and remains almost the same thereafter. Increase in concentration of Pb also decreases the value of hardness. Temperature measurements indicate that the hardness decreases with increase in temperature (77 to 300 K) with no abnormality near the transition temperature. The results are explained in terms of intrinsic bond strength.
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M3 - Article
VL - 126
SP - 115
EP - 120
JO - Physica Status Solidi (A) Applied Research
JF - Physica Status Solidi (A) Applied Research
SN - 0031-8965
IS - 1
ER -